Sparing Gear Where Can I Buy M2037 Airsoft Gun Spare Gear?

Where can I buy M2037 Airsoft gun spare gear? - sparing gear

The gun is powered by ... this will not last long ... Mine stop working, so I opened ... It identifies three are art ... it touches the engine is worn out ... I have to replace it with a new one ... I can not be a substitute ... Anyone with a similar problem? Where can I find?