I doubt there is anything that is plug and play with the Tamiya system. Chances are you will need new connectors at the very least. The elevation motor, recoil, turret rotation are all fundamentally the same. So any system will drive the Tamiya end devices.
My Website is the best place to read about my opinion as to why I use the BARC/Benedini over anything else. It is the one system that mimics the Tamiya battle system the best with the least amount of fuss.
There are a lot of boards out there now that exceed the sound quality of Tamiya, and just about everyone of them is unique enough to make direct comparisons hard. You need to ask yourself exactly what you want out of the electronics, and then choose the system that works best for your needs.
Support is important with electronics. Without it, the best designed board can end up in your junk drawer