Miller Bearing has a split bearing collar(?) that makes an excellent spacer and you dont have to take the springs out to put it in. The ones I bought for my wife's xj are 2 1/8" inner dia and 3.5" outer and .75" thick, with the 2 1/8 ID they dont seat all the way down on the bumpstop tower and were good for about 1.5" lift. . Work great. Compress spring, bolt two halves of collar together, tack weld collar together for kicks, release spring. They can get them in a wide variety of sizes. Check with a local industrial bearing and seal shop. Dunno where you are. I found these for $9 each in Florida. Is that how you spell collar? Stupid cant remember how to spell stuff, tired.......................................