Looking for vintage toy package production art
 

This might be a long shot but - does anybody have any vintage toy production art they're looking to sell? Like, paintings or drawings that were used in the production of toy package art? The stuff turns up on eBay occasionally but I haven't seen any in awhile (besides I think the Jim Lee TMNT toy paintings which I'm not interested in). I'm particularly interested in any cartoony style stuff... Feel free to PM me if you're not comfortable posting here. Thanks!