I think 3D printing really changes the game where repro parts go. It only takes one person to make replacement treads. Granted, there are 10x as many people who got the Haslab Proton Pack as ordered the Thundertank. But it's been out maybe 7 days in the U.S. and I'm already seeing 3D printed repro parts and one guy developing a new electronics microcontroller for it. And while you don't see it MUCH because it's higher grade than a lot of CURRENT 3D home printers, there are a lot of sites where you can 3D print in rubbery plastics, industrial grade materials, stainless steel... New treads shouldn't be hard at all. It's basically like modeling a cylinder with a tread texture on it. I don't know that they'd be AFFORDABLE but it's not like you need a whole production run. And if you DID have that kind of demand, it would be easy to talk Ramen Toys into doing an upgrade kit. I believe I saw them say that their highest production run of anything ever was 1500 pieces. And they're making accessories for MOTU and TMNT now and obviously big 80s fans with their not-Silverhawks, not-Bravestarr, not-MASK, and not-Centurions figures. Think of what you'd get in addition to treads and pitch them on a full upgrade kit.