[JayCrouch]

make one

the important thin is to take the strain off the cable's connector

use whatever mic mount you use for the mic, and in it's 5/8" thread attach something that will be the cable holder

this way you can secure the weight of the mic by the cable, and not the XLR jack/pins...

try something like a mic clamp or a claw, and perhaps a touch of gaffers tape...