http://pets.groups.yahoo.com/group/FeLVPositiveCats/ There's a Yahoo Group.

FELINELEUKEMIA.ORG They recommend this site! If you contact them, they can direct you.

I couldn't find FelV specific shelters in PA, but here are some lists:

http://www.kittysites.com/rescue_pa.shtml

http://www.netpets.org/cats/catresc/pennsylvania.htm

http://directory.google.com/Top/Recr.../Pennsylvania/

I hope some of these help! www.felineleukemia.org would be a good place to start, I think.