Depending on your specific needs (more space?, more comfort?, just something different?) - and your fabrication skills, here's some in-house customs seats made by the guys at SKJ Customs for the LS3 powered car they had at SEMA this year. Turns out the car owner's son is really tall and needed more foot room than the OEM FFR supplied seats offered.
Simple two-piece aluminum "shells" bolted to the floor & rear bulkhead, with relatively thin padding/upholstery by another local shop.
LOTS of additional foot room (I'm 6'3" tall and when seated in the car, can barely reach the front of the DS foot box) and reasonably comfortable ... esp. when you remember most of these builds are weekend "fun cars/Saturday night cruisers" and NOT long distance over the road vehicles.
NOTE: 2nd attached picture (black with red stripe car) are some OEM FFR seats in a Mk4 for comparison.
Pretty sure (95%) they are FFR OEM seats - recovered along with the tunnel etc by a custom upholstery shop, same upholstery shop that covered the aluminum "shells" in the gray w/blue car in the 1st picture.Very nice. Are you sure about the seats in the second pic though. Those don't look like what FF shows in the parts section.