.comment-link {margin-left:.6em;}
This should go in your banner.tmpl file. I am not bothering with BANNER_TYPE_3, since I am not really sure how I would represent that in a COinS format, anyway.
Thanks to David Walker for showing me how this would work.
<TMPL_IF BANNER_TYPE_1>
<TMPL_IF ATITLE>
<TR valign="top">
<TD class="LabelBold">Title:</TD>
<TD class="Label"><TMPL_VAR NAME="ATITLE" ESCAPE='HTML'>
</TD>
</TR>
</TMPL_IF>
<TR valign="top">
<TD class="LabelBold">Source:</TD>
<TD class="Label">
<TMPL_IF BTITLE>
<TMPL_VAR NAME="BTITLE" ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF ISBN>
[<TMPL_VAR NAME="ISBN" ESCAPE='HTML'>]
</TMPL_IF>
<TMPL_IF AULAST>
<TMPL_VAR NAME="AULAST" ESCAPE='HTML'>
</TMPL_IF>
<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:book<TMPL_IF ATITLE>&rft.atitle=<TMPL_VAR NAME="ATITLE" ESCAPE='URL'></TMPL_IF><TMPL_IF BTITLE>&rft.title=<TMPL_VAR NAME="BTITLE" ESCAPE='URL'></TMPL_IF><TMPL_IF ISBN>&rft.isbn=<TMPL_VAR NAME="ISBN" ESCAPE='URL'></TMPL_IF><TMPL_IF AULAST>&rft.aulast=<TMPL_VAR NAME="AULAST" ESCAPE='URL'></TMPL_IF><TMPL_IF INST>&rft.inst=<TMPL_VAR NAME='INST' ESCAPE='URL'></TMPL_IF><TMPL_IF YEAR>&rft.date=<TMPL_VAR NAME='YEAR' ESCAPE='URL'></TMPL_IF><TMPL_IF SPAGE>&rft.spage=<TMPL_VAR NAME='SPAGE' ESCAPE='URL'></TMPL_IF><TMPL_IF EPAGE>&rft.epage=<TMPL_VAR NAME='EPAGE' ESCAPE='URL'></TMPL_IF>"></span>
</TD>
</TR>
<TR>
<TD>
<TMPL_IF INST>
<TMPL_VAR NAME='INST' ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF YEAR>
yr:<TMPL_VAR NAME='YEAR' ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF SPAGE>
pg:<TMPL_VAR NAME='SPAGE' ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF EPAGE>
-<TMPL_VAR NAME='EPAGE' ESCAPE='HTML'>
</TMPL_IF>
</TD>
</TR>
</TMPL_IF>
<TMPL_IF BANNER_TYPE_2>
<TMPL_IF ATITLE>
<TR valign="top">
<TD class="LabelBold">Title:</TD>
<TD class="Label"><TMPL_VAR NAME="ATITLE" ESCAPE='HTML'></TD>
</TR>
</TMPL_IF>
<TR valign="top">
<TD class="LabelBold">Source:</TD>
<TD class="Label">
<TMPL_IF JTITLE>
<TMPL_VAR NAME="JTITLE" ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF ISSN>
[<TMPL_VAR NAME="ISSN" ESCAPE='HTML'>]
</TMPL_IF>
<TMPL_IF AULAST>
<TMPL_VAR NAME="AULAST" ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF YEAR >
yr:<TMPL_VAR NAME='YEAR' ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF VOLUME >
vol:<TMPL_VAR NAME='VOLUME' ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF ISSUE >
iss:<TMPL_VAR NAME='ISSUE' ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF SPAGE>
pg:<TMPL_VAR NAME='SPAGE' ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF EPAGE >
-<TMPL_VAR NAME='EPAGE' ESCAPE='HTML'>
</TMPL_IF>
<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal<TMPL_IF ATITLE>&rft.atitle=<TMPL_VAR NAME="ATITLE" ESCAPE='URL'></TMPL_IF><TMPL_IF JTITLE>&rft.jtitle=<TMPL_VAR NAME="JTITLE" ESCAPE='URL'></TMPL_IF><TMPL_IF ISSN>&rft.issn=<TMPL_VAR NAME="ISSN" ESCAPE='URL'></TMPL_IF><TMPL_IF AULAST>&rft.aulast=<TMPL_VAR NAME="AULAST" ESCAPE='URL'></TMPL_IF><TMPL_IF INST>&rft.inst=<TMPL_VAR NAME='INST' ESCAPE='URL'></TMPL_IF><TMPL_IF YEAR>&rft.date=<TMPL_VAR NAME='YEAR' ESCAPE='URL'></TMPL_IF><TMPL_IF SPAGE>&rft.spage=<TMPL_VAR NAME='SPAGE' ESCAPE='URL'></TMPL_IF><TMPL_IF EPAGE>&rft.epage=<TMPL_VAR NAME='EPAGE' ESCAPE='URL'></TMPL_IF><TMPL_IF VOLUME >&rft.volume=<TMPL_VAR NAME='VOLUME' ESCAPE='URL'></TMPL_IF><TMPL_IF ISSUE >&rft.issue=<TMPL_VAR NAME='ISSUE' ESCAPE='URL'></TMPL_IF>"></span>
</TD>
</TR>
</TMPL_IF>
<TMPL_IF BANNER_TYPE_3>
<TR valign="top">
<TD class="LabelBold">Source:</TD>
<TD class="Label">
<TMPL_IF TITLE>
<TMPL_VAR NAME="TITLE" ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF NUMBER>
[<TMPL_VAR NAME="NUMBER" ESCAPE='HTML'>]
</TMPL_IF>
<TMPL_IF INVLAST >
<TMPL_VAR NAME='INVLAST' ESCAPE='HTML'>
</TMPL_IF>
<TMPL_IF YEAR >
yr:<TMPL_VAR NAME='YEAR' ESCAPE='HTML'>
</TMPL_IF>
</TD>
</TR>
</TMPL_IF>