I have searched CPAN in the MARC namespace, but didn't find anything that seemed likely.

Really? Both MARC and MARC::Record seem very likely.

I am much more familiar with Perl than PHP. Does anyone know of an alternative to openbiblio based on Perl rather than PHP?

• perl OPAC site:sourceforge.net/projects/ or perl library catalog site:sourceforge.net/projects/ ... Perl : Web-Based : 5 - Production/Stable.. two most promising results
  • http://sourceforge.net/projects/emilda/ Emilda is a complete Integrated Library System that features amongst others an OPAC, circulation and administration functions, Z39.50 capabilities and 100% MARC compatibility. MARC compatibility is achieved using Zebra in conjunction with MySQL.
  • http://sourceforge.net/projects/webpac Implementation of web library catalog (sometimes caled OPAC) based on SWISH-E and perl. It uses OpenIsis for CDS/ISIS files, http feed for web listings, MARC files and other structured sources like M$ Excel files. Uses flexibile XML config files.