Type R Club of America

Here is link to buy the hardware for spoon twin blocks bnib from Japan. Good price, I bought a few sets successfully.

https://www.rhdjapan.com/spoon-sports-t ... 2-ek9.html

Not affiliate link etc., just posting link for convenience.

FYI these kits can be purchased from (longtime) Expo sponsor, VPR Motorsports. I don't see them listed on the site (atm) but I personally bought these kits from VPR:
https://vprmotorsports.com/t/brakes

Spoon Twinblock hardware available:
-Piston kit
-Retainer + bolt kit
-Caliper seal kit
-Collar set
-Caliper bolt set