resurfacing the 'flywheel'

No need as there is no clutch that operates in a conventional sense. The cvt's dual planetary gearsets allow zero speed at the wheels in drive along with variable gear ratios and reverse all without a clutch or torque converter. In reality this computer controlled transaxle with two electric motor/generators is the real engineering marvel in a Toyota hybrid, especially considering its small size.

 

You can buy new transaxle parts if you wish but there are no real wear items in it other than maybe some bearings. But you could get a low mile transaxle and swap it in if you want.