Sector 35 makes a pre-assembled metal RMSH track set:
https://hobbyterra.com/product_info.php?products_id=4258
Pro: Pre-assembled tracks mean minimal assembly.
Con: The people assembling the tracks have CA glue all over their fingers. Since CA is clear, you can't see a thing at first. But if you use a blackening fluid, the CA smudges on the tracks will prevent the areas from changing color. If you paint your tracks, no biggie.
I have used Sector 35 tracks on several Tamiya tanks (Churchill, Cromwell, IS-3), and they all fit with no mods to their sprockets.
HTH and good hunting!