I have an unknown spa and pump and the pump is leaking at the impeller shaft.

THe input shaft on the motor is rusted and is really pitted and consequently will probably need to be replaced.

Now, the bad part. The water is heated by circulating water through a 3/8 inch diameter tubing that runs around the pump motor casing. NO ONE where I live can tell me who made it or what brand it is. THe trouble is is that I need to replace the majority of the parts and knowing the manufacturer would make this infinitely easier.

Does anyone know about this type of pump and who I could contact for parts?
Thanks in advance
Chris