I built two a while back, the total cost was like $4 or something and they work well for cabs and kick drums. Anyways, get a 2x6 and cut it up, two about a foot long and two about 8 inches long. Buy two bolts that will screw into your microphone clip. Drill out a hole slightly smaller than the bolt and hammer it through so it is very snug. Then hammer in the head of the bolt into the bottom piece as much as you can (a chisel to deepen the hole would help here. Then, take four 2 1/2" screws and connect the two pieces of wood with the bigger piece on the bottom. I was classy and stained them. Although they're not adjustable up and down, they're hard to knock over, dirt cheap, and I still use them to this day. Hope this helps.
cheers,
scott