Mike008 wrote:
... some kind of clamp on spacer...
I take it that you what you mean by "clamp" is that it be temporary and the ability to be able to temporary and remove it at will. That will be a challenge. A "C" clamp I do not believe will have enough engaging force... Here is an idea: turn the TS 90 degrees and use 2 hose clamps. If it works, the only drawback I see is that it would be a PIA to remove.
Personally, I bought a truck and I don't mind if it rides like one. I have permanently mounted home-made uppers and lowers and leave 'em on all the time as well as have the shock setting at the stiffest setting.