I got a responce from Blitz after contacting Ogura.
"Dear Kevin,
My Name is Tomas from Blitz Japan. We had a request from Ogura if we could
help you out.
First, you are right that Ogura supply's the supercharger and we design the
specific kits using Ogura's super charger.
As I mentioned, we design the kit specifically for a typical vehicle model,
test it thoroughly and start mass production. As a result, we do not have
different pulley sizes in our product line to fulfill your request. We wish
we could help you out but I'm afraid that it is over our power.
Thank you.
Sincerely yours,
Tomas Kasari
Blitz Co., Ltd"
So naturally, ive emailed back to do some more digging, basically about the other pulleys on the other kits, aswell as converting to a solid pulley.