HOLY CRAP.. i have the OEM one from a car i pulled off like 20 years ago when I put a Cervini hood on it. Ridiculous what the parts on these cars are going for now.
Not that I know of...I did mine and took the rear quarter cover off...well I pealed it back enough to get access to it, other than that, it was just a few screws and it plugs right in...got my motor from Rockauto, still works great and they're relatively cheap. Just don't mess with the window adjustment, I've heard that can be a brutal time to get the alignment right, thank God mine didn't need it.
Pulled the back seat to replace the bushings in that window motor. Everything went fast and easy. Best part was finding this 1998 ticket to men in black under the seat.