after market

I read many forum's but once people fix their issues they don't follow up on it worked out or any details on any other issues they worked out. So I am sharing my experience . My issue when I bought a used 1996 sea-doo GTI 717 5865 . I own a lakehouse so I have a advantage of trial and error...

Any idea where I can get a fuel gauge for this boat for a reasonable price? Is there something that would be a good substitute? Thanks