I have a ZF 5HP30 that just came out of my 540 for sale. I just bought it from LKirt Koeller at Autosport Unlimited last spring. It has 10k at most miles on it.

I paid $2345 for it. I am asking $1600 + shipping. Thats a whole lot cheaper than anything else you are considerinng. I can have it to you by next week if you are interested. It is sitting on a pallet at Koala Motorsports in Ohio. I took it out to do my Manual conversion. Email if you are interested. - JT