For those interested (I received a PM today but don't believe my response got out to the original requester).
Polyflex makes engine mounts that are an exact fit for the Nissan 22 bolted to the bed of our HC43 Ketch, circa 1979.
The raw water pump that we use is a Sherwood pump and impeller, G50 body style with 10615 impellor and Browning AK46 X 5/8 pulley. Our new cost in 2006 was $385.00.
Bill