CR500

I have a meter pn 37200-HN0-771 Gear position is gone and miles have gone erradic. I was able to swap to a meter from an older unit and everything works but I cant order new of either meters. My issue is both meters are discontinued. I have a 2002 trx 450fe and I swapped a 98 trx450es everything worked. Is the one I have repairable because the screen seems to be okay just the functionality of it is not.