Hi Kevin I have just seen your post on replacing your carpet.
I have a J spec n/a 93 supra auto. and when i got it the carpet was really badly stained so i took it out to try and replace it but i found it was in one piece and is moulded to the shape of the floor pan, it also has foam sound proofing moulded to it.I tried all kinds of carpet cleaner to get the stains out but nothing would touch them.
I had some interior spray in my garage so i tryed it on a small piece of carpet i had, and it looked good so i sprayed the supra carpet with it and it looks as good as new.
I got the spray from Hallfords it's called Foliatec Interior colorspray
and cost £15 a can, i used two cans.
As for removal it took me about half an hour with no problems,
five bolts to remove each seat unplug the wires for seat belts and electric motors(drivers side) then remove centre console philips screws.plastic strips on the sill's just pull off,undo two bolts for seat belts and out it comes.
If you send me your E mail address i can send you some photos.