Actually it has been done sorry your not the first... here's a bonus it's from a source we all can trust!
http://www.t206museum.com/page/tensizesleeves.html
Also for the record I didn't think Adam was too rough...I agree seemed like a fishing post for a business transaction which really should be in the BST area.
Cheers,
John
P.S. Murray's in London also makes small penny type T-card sleeves.