Go to the Yotatech WEB site and find TREKKER PAUL he has alot of truck parts and his pricing is reasonable.
I have a booster for sale... its for a 72-73... a remanufactured booster of an Aisin ... has new check valve i am positive the master hooks right up... the rod may need to be shortened just a bit... but... not 100% sure about the mini's length of the booster rod.... may be correct length $130 plus ride (around 15-20 extra i assume)