Your pics appear to come from rctank.de., LG. If you look there under 'accessories', you'll see a recoil unit for the turret:
https://www.rctank.de/ACCESSORIES_15
This Taigen Leopard 2A6 is available in BB
and IR configurations, but how easy it would be to gut one turret type interior- BB, say- and replace it with the IR version- is a moot point. Generally, swaps of this kind are fairly routine, however, as the base turret castings are identical.
https://www.rctank.de/LEOPARD-2A6_1
The turret pic you posted there actually contains the IR version, and is ready to fit, apparently.
T34 rotation and elevation units would be exceedingly difficult to fit, and use, in this context. Indeed, such a transplant would probably require a tap of Gandalf's staff to make it happen

"Get your facts first, and then you can distort them as much as you please"- Mark Twain.