im not a dealer for them, I have their clutch in every one of my cars. all the celicas, my high HP Supra and even my dodge truck. They came into the import world about 8 years ago. they sponsored my 7th gen when I raced it.
I push their product because i have never had any trouble with them and their awesome customer support. When I need a clutch thats a OEM replacement but with a little added strength, I just call Andy or John and they build it for me. Thats what I did for my V6 swap. I got a stock replacement disk with a little more pressure plare grab to support the SC. (coming soon) the pedal is not harsh at all.
they also carry in stock hybrid clutch for V6 swap using the S54.
http://www.dxdracingclutches.com/