FWIW, I did some reasearch on this and came up empty-handed. The guy on ebay that sold me my truck did failed to mention a lot of broken items including the passenger side mirror. When I picked up the vehicle I just figured I could buy the replacement mirror glass anywhere. HA! After 6 months of constant searches on ebay for a passenger side mirror I went to the dealer. Will they sell the glass? Of course not, you have to buy the WHOLE mirrior. Cost? $400. Yet another way the dealer looks out for ya.
I am going to go to a glass company next. Just haven't gotten around to it yet.