AZHAR, No longer making the 42, no need for it when the dimensions are the same as the 52 except it was 2 ounces lighter. Therefore throttle control is necessary.

JOEAIRPORT, the adjustable radial mount added too much unnessary weight, not practical.
Every one that I have seen that needed extra length uses a very simple solution, use a hardwood 1" dowell cut to the proper length and drill a hole thru the center,VIOLA!! any size spacer you need and CHEAP to.

The reason for Taurus not using a 4 point spindly stand off is that the engine developes a lot of torque and in testing years ago actually watched the engine twist the stand off.Very unsafe condition. Ask any engineer which they would prefer, a 4 point standoff or a full contact 5 point radial mount. In our case, there is no discussion on the issue.