I took out the dash and gauge panel out of my 91 to try and fix my stuck odometer, i figured the j clips were broken after reading a few posts about it here, but it turns out one of the plastic gears had a flat spot on it and when i attempted to turn it it actually broke more of the teeth off. So is there anywhere to get a new gear, or do i just need to go to a junk yard? After i reassembled my gauges and the dash I realized that my speedo was off somewhere around 10-15 miles and also my tachometer isn't registering correctly. The only thing I can think of that I did was turn them upside down a few times while working on it and I think that is what messed them up. I'm going to pull them out again but I don't really know how to go about repairing it, any ideas?

Thanks guys