Heres a upper kit only from all balls on ebay.

http://www.ebay.com/itm/Rear-Upper-Shock-Bearing-seal-kit-Suzuki-LT-250R-85-90-/271369797240?pt=Motors_ATV_Parts_Accessories&hash=item3f2ee67e78&vxp=mtr

This is the one I picked up. It says that it includes everything for the rear shock assembly but I havent pulled it apart to verify that.

http://www.ebay.com/itm/All-Balls-Shock-Bearing-Seal-Kit-Suzuki-LT250R-1985-1985-1986-1986-1990-/300917438700?pt=Motorcycles_Parts_Accessories&hash=item461013b8ec&vxp=mtr#ht_0wt_0

I would pick up the bushing/bearings and not try to reuse one that was removed. They do get pretty messed up when taking them out usually.