I followed your thread as I am in the process of ordering a brand spanking 175, and have done some research into what is available.
I really hope you manage to get things sorted, and it runs well in the end.
I read your earlier comments with regards to the gauges, and as far as I know at the moment all that is available with the engines now are the ICON pro gauges, which come as standard. Apparently these are an improvement over the I command gauges, and are pretty much plug and play. They apparently plug into your NMEA 2000 network, and then if you want additional dedicated gauges such as water pressure, fuel etc, they just piggy back into the RPM master gauge. Aslo they can accept analogue inputs from oil tanks, fuel tanks etc.
Probably not what is on your mind right now, but just thought I would mention it if you want to do the research.
Good luck with the repairs........