My buddy has a RUPP mini bike...not nearly as good condition.
Another friend has a track for a [70 something] Harley Davidson snow mobile...he bought a whole trailer load of returns/damaged stuff from Canadian Tire years ago.
A friend of mine had one from way back he was going to restore a sled he had but ended up not doing any thing so lucked out. Other Rupp projects I go to vintage shows check out vintage sites and I always find what I need I got one track from Intech Graphics in Rocky Mountain House and another from Elvis Bill Stull in Wisconsin The search is the most fun now I would like to find a1972 TN 340 project or good rider .