I was just paging through my auto and RV book and came across this add that has got me wondering if it would work. These guys are making tracks for skid loaders connected with chain starting at $690 or you could get bigger chain for 8somethin...has got me wondering if it would work as a "poor mans track"...if anything it looks pretty simple, maybe able to fab that in the garage if you had the time patience and a metal break. Looks like you just bend the metal to fit your tire and weld it to everyother chain link...wish i could post the picture i have here on my desk
heres the site
EEL RIVER STEELWORKS, INC.