I have a set also, come painted in any color BUT PGP. Got the black ones online. These are not exclusively JDM, but very pricey. I think I paid like $370.00 or something for them shipped. I do think they keep some rock chips away from the rocker panels and lower door and they look pretty good too.
I got mine from Sparks Toyota, they were made in Japan obviously, but everything was written in English on the packages when I opened them up. I do know my Toyota dealer in MD stated Toyota never made mudguards for a Spyder. I went by to show him after i installed them. Haha!
I got them from an English car, but they're also available as an accesoiry in the Netherlands. At first I thought they didn't do much for the car, but now I think, it gives it a little more "oomph" in the looks-department, especially on an otherwise near to stock car.