Kitty Cat Snowmobiles

Tore down my daughters sled and noticed the nylon bushings on the spindles have worn down to nothing. There are four of these (two top and two bottom) that need to be replaced.

Is there an aftermarket part available to fix this so I dont go back to the dealer and pay $7 each, if they are even available.

Dan

And the label on the side says it is a 1979 but I am being told it is a 1980 since the year stamped is the year it is made but for the next model year. Is that correct?