Help need spark arrestor

the best your gonna find is a clamp on, answer used to make spark arrestors back then for them but if you found one it be like used they was called SA pro's. PC & FMF didn't really start making SA's till about 94. Maybe try one of the FMF universals and like make your own using the stocker of course it's going to require welding if you want to do it totally right. Maybe the one from a 1990 will fit it was the same frame as the 89's or modify one from like the 93 - 97 model years to fit.