LP Box Set Plastic Covers... where?


I buy a lot of used vinyl, much of which is box sets. Getting the plastic covers for single LP's is a no-brainer but where can I get covers for the boxes?
Lloyd
lloydlintscom
these folks have the best selection of sleeves, boxes, etc., of which i'm aware. they do make a 2 mil oversized sleeve to accommodate at least some sizes of lp box sets:

http://www.bagsunlimited.com/

-cfb