Jabsco Water Pump Rebuild

I hear thru the grapevine that it's starting to get harder to find the parts,all part numbers I had for complete replacement pumps are discontinued. The only unique thing though are the body,cam plate and shaft.Every thing else,end plate,wear plate,seal,bearing,impeller,drive dog you can make or still get.
What is exactly wrong with yours? How about some pictures? Here is a place who might be able to help and here is another but their prices seem awful high.
Here is a parts breakdown with part numbers,everything but the drive and the front cover are the same as you need.