I bought a pair earlier this year and *apparently* they were off of a Yamaha sled. They seemed to fit fine except that I had to drill out the mounting holes on the top and bottom of the ski's a larger size. The bottom hole was no problem, but the top hole was a pain due to the metal being a hardened steel, took a lot of cutting oil and time to cut through.
The part number on the receipt says, "500-K08-114-16" and the list price was $44.95 Canadian but I got a bit of a discount and only paid $39.95 each. Also of course I had to go and buy new bolts and nuts as well.
Hope that helps,