There is no OOB M2A2E8 kit. You will have to get a base kit and either kit bash the proper parts or use a conversion.
Use one of the Tasca/Asuka M4A3E8 kits if you can find them.
Luckily Tiger Model Designs has a fantastic Canadian M4A2E8 conversion they released in 2016...
The cupola should be the standard type used on the M4A3E8 turrets. The differences lie in the rear hull due to the diesel engine.