A-Body Console Shifter on Ebay
original > aftermarket anyday of the week! At least in my book, even if you have to get it properly rechomed to be equal in condition.
The last one I sold I got $325.00 shipped for. Although that had a nice Hurst Competition shifter mechanism and was ~3 years ago when the prices were peaked.
It came out of a 1969 383 4-speed Barracuda.