Shock Bushings?

Just picked up a 98 Sportsman 500 and I am starting to work my way over it doing all the normal checks and maintenance. I noticed that the rear shock bushings are totally worn or just gone all together. I did some searching and can’t find replacements, any help would be appreciated. I am also looking for a replacement air box because all but three of the lid bolts are broken off so the lid is not secure or sealed.