I wouldn't say big, but there is a market for 1/24 tanks since they're much better suited for indoor or table top battlefields. I have a friend in the business so I'll ask him about sources for tracks, and I would also look at the 1/18 stuff. like forces of valor. I know they make a 1/18 panther, but I don't know if the tracks are decent or those crummy rubber band jobs.