There is a JIRA ticket for this issue which includes references to the 2.0 fix:
If you want to share 1.x code, that would be a good place to put it for future reference.
From: N.Boeg@lse.ac.uk [N.Boeg@lse.ac.uk]
Sent: Friday, December 13, 2013 11:26 AM
Subject: [VuFind-Tech] Displaying 264 Marc tag
I’ve just been successful in displaying data from the MARC tag 264. RDA for publication date, publisher, etc..
The “fix” I have found for this is for the old Vufind, not for Vufind 2.0.
I’ll send a copy of the code to Demian Katz to post in an appropriate place for other colleagues to use and manipulate for their own institutions.
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