The factory MM skis were like 5" wide. Aftermarket Gen I Simmons skis are 6" wide, I have them on my MM and I love'em. I definately wouldn't get a set of stock MM skis. Someone please correct me if I am wrong.
You should use apex mountain skis you cut off there'd mounting tabs for there ski loops and drill holes for your old loops and by all the hardware for the apex it's cheap