Trailer axle seals

Hello I have a 2019 eyra that I got in February of 2019. I have two questions, the first question is about how long does the axle seals last? I have one that is leaking oil out on the rotor. It is the front axle on the starboard side. Second question is I live in Missouri close to table rock lake. I’ve been having issues of finding a basscat dealer that is close to my location. Where I bought the boat they are no longer a authorized. Bass cat dealer. The next closest place to me is  also No longer a authorized dealer a bass cat. So any ideas of the authorized Bass cat dealer that is close to table rock Lake would be greatly appreciated so far all I could find is Bull Shoals Marina and the Bass cat factory it’s self. I know I only said I have two questions but actually I have one more question I have smart craft gauges and I do believe they are the SC 1000 and I have hooked up the vessel view link box now once I have done that my smart craft gauge will not read my mail per hour from GPS does anybody know what needs to be done for it to read from the GPS? I can get it to read off of the Pitot But of course doing that I’m doing 5 mph and it’s reading 1.6 mph. Any help with these items would be greatly appreciated.