[_paralyzed_]

you described a kyosho blizzard perfectly. I've dug and dug for tracks (I wanted to make Mattracks for an e-maxx) and there just isn't anything out there. Any tank tracks are low speed like Neil said. Blizzard tracks hold up good for smaller vehicles, but nothing as large as something that would use savage shocks. You're definitely going to have to think outside of the box to source tracks. Good luck, hopefully you canfind something.