If you do need a new one, purchasing the "fan motor" online is cheaper than an aftermarket (and junk, IMO) assembly. Your right-side fan is probably fine. Be sure to order a new belt.

I didn't specifically address this earlier, but there are specific electrical requirements for this motor. It's not run by resistors and relays as the prior fans were. The fan motor is pulsed to start, and to run at less than full speed. If the controller sees the wrong electrical signature from the fan, it shuts down the power and tries again in a few seconds. Well, mine does. Yours works similarly, but using different modules.