I sent my pump to Exactal Tool. I forget when and who but you can find it in the search if you like. I think I paid $300 (might have been $400) for a complete reconditioning. He removed the liner and replaced it with a brand new stainless liner, installed new bearings and seals (parts included in price) and installed the prop I sent. I believe he even covered return shipping. It's been well over a year now, the bearings are still like new and the liner has no warpage or distortion of any kind.
That's why I sent it btw. All the pumps I had had some distortion of the pump sleeve. I sent the nicest one I had and he made it like brand new (Actual new is $600 I believe). Also gave me a $50 credit on the job for a 750 pump I sent with it. I was pleased for the price.
