Speedometer

[Falkor]

Hello, I just recently bought a 2002 250 from a guy for 1000 dollars. It has 6k miles on it and it's in great shape externally. when riding, I noticed the tripometer doesn't work and neither does the light for the speedo. With more riding I noticed that the spedometer will jump when I'm reving high and also sometimes it will not work. Today I took it apart to have a look and it seems that someone busted it up inside and taped it back together with what seems to be packaging tape. Any advice on what to do with this? I had a guy look at it a couple days ago and said it's in great shape other than a little dry rot on the tires.
with all of that being said, any advice on the best place to get the full unit? i'm googling the hell out of "Speedometer unit" and "odometer unit" and all that's popping up are small parts. thanks!