One of the problems, Lee, of upgrading Taigen/HL tanks is that bolts, shafts, circlips, screws etc., used in their construction are generally only available with the components they're used with.

Unless, that is, someone just happens to have some left over from an upgrade.
Thus, it will likely take a full set of wheels ( or suspension arms, perhaps) to deliver a full set of axles. Heng Long Panzer.de have these screws, but I think these are probably for the plastic roadwheels.
https://heng-long-panzer.de/en/screws-l ... g-arm.html
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.