Terry
Holes Bay Marine looks after mine and I believe installed the original.
Be aware the later baystar steering wheel pumps are not repairable so you can't change o rings if they leak,you will need a new unit.
Also if you don't have sufficient clearance to remove the hydraulic ram cylinder rod when in situ the whole unit will need to be removed/replaced.
Corrosion of the exposed fittings can be an issue requiring a new unit.
Talk to Chris/Richard at HBM to get a quote.
Wouldn't be without mine or my Bennett hydraulic trim tabs
Peteg