The best I have seen are the stick ons that this guy carries at:

http://www.classicusc.com/D_E_Elevator_p/deelv01.htm

They are a little pricey at around $25. They look like leather and have very thin sides so it does not cause as much negative cast as the usual ones you see. There are so many sizes, some straight and some with different rise at the front and back that you really have to call and talk to the owner. His name is Al and is very nice.

I bought two from him and my friend bought around ten of them. Classic had a display at Hausman's Hidden Hollow SxS Classic in Pennsylvania a couple of months ago. I also bought one of those three wheel carts from him at a very good price.

So many guns, so little time!