I paid $1300Aus for the supercharger with no bracket or tensioner, which I was happy with seeing as they are rare in Australia. I paid $415Aus (including shipping from the states) for the tensioner, spring and chev bracket. With the dimensions of the shaft etc and the design plans I found on the net I can make a new pulley, I would prefer to buy one and make a spare. it looks like the 3 dowl pins for the inner half of the pulley broke, which is why it was removed, I shall modify it and put bigger pins in it to prevent this happening again. I have had it apart and the internals are in great condition, it looks to have had little use.