I looked at it on 27 Dec. It is on Highway 10 just west of Ellensburg Wa. It does have wipers, but it needs to be Nixsonized.
More pictures here http://www.forumsforums.com/3_9/showthread.php?t=77522
https://northernwi.craigslist.org/snw/d/thiokol-spryte-snow-groomer/6437490445.html
Here's a good spryte for you, just needs the passenger cab. Red isn't too far from orange