Both are used but in great codition. The shaft has been machined out and saves a little over 1 pound. The rotor has an aluminum hub and also saves over 1 pound. I'd like $125 for both + shipping.
This shaft is the same as stock for the 1M chassis. It has a 1" keyway end for the driven clutch and 7/8" splined end for the gear case side. Unless the ZR models are different I think it would fit.
This shaft looks like it fits about a billion sleds. Click on the link, the stock part number is 0702-266. There it shows the long list of sleds it was used on.