Perhaps Taigen can leverage their purchasing power and get some Hentec kits to offer as upgrades. Then maybe use this t-34 and owner as a pre-runner for the fix....
The Tiger looks to have a Hentec already in it.

I bet this owner would be satisfied and future customers would have a part available should they choose it. Add a little slip of paper that says for increased durability we recommend XYZ and we also offer XYZ accessories.