I have a really good upholstery guy too but he is so busy its hard to get him to do anything. I honestly think I am going to try and reupholster my seats myself. I'll try it with cheap vinyl so I'm not out much if it looks like crap!
The guy that's doing mine says it's going to take six yards to do the two buckets and he puts a thin layer of sponge behind it whatever it's called.. also he was adamant if I was looking for my own material to get Automotive grade..