We experienced a similar drive unit failure on our aggregate processing conveyor two years ago, and opting for a professional RJ Link gearbox repair was the best decision we made.
Rebuilding the existing unit eliminated severe gear chatter, restored full torque transfer capabilities, and saved us nearly six weeks of waiting for a factory replacement.
The reconditioned assembly has run continuously under maximum load without a single hiccup ever since. If you want to save money without sacrificing equipment longevity, restoring your current setup is definitely the way to go. You will be very pleased with an RJ Link gearbox repair.