any good aftermarket seats that are shorter?

[Paladin]

can you cut your floor pans down? That's what I had to do with my 65 mustang. Its a pain, but otherwise no aftermarket seat will look right. Also, take a look a cerullo seats. I am not that big, 5'10 175, but most of the 'racier' seats (like corbeau) were WAY too narrow across the shoulders.
Good luck!!