Shortened V8 M21 Input Shafts

[Addo]

I want to get my drive car more drivable for summer.
Back in the old days we used to put V8 M21's behind our reds with shortened input shafts. Great ratios, loved em. The m20 makes me feel like I'm driving around with a stick stuck up the Kyber pass, very frustrating ratios to say the least. I'm going to throw it as far as I can and put in a M21 just for old time sake. I know they still do the shortened shafts but would like to know who and where?
Any feedback appreciated.
Addo.

[Addo]

Ok, I know the answer,
J & VR transmissions, Blacktown.