[Runequest] Map of an Abbey?

[royce at efn.org]

Greetings,
   I would like to work an abbey into my campaign.  A look online found me
a few decent floor plans, but they were all bare bones.  Does anyone
know where I could find something more fleshed out?  More ready to
play?
   Yes, as some of you doubtless guessed, I ask because I like Cadfael. 
Shrewsbury Abbey would be welcome in a campaign I'm planning.  For that
matter, details on the medieval town of Shrewsbury would be nice, too.
   Guidance would be warmly welcome.
   Sincerely,
Asher