Need a lot of cold shoe mounting points on the cheap? The Flashpoint Camera cage might be something to check out. At $64 this thing has 5 cold shoe mounts on either side, 9 across the top, as well as 2 clamp type cold shoe mounts, and through holes all over the rig.
The cage itself has handles that are designed to be attached to the bottom of the unit which seems kind of awkward, but the sheer number number of mounting points seems to make up for it. I don’t think I would use this as a hand held rig, but if you need to mount say a boom mic, wireless pack, led light, and audio mixer on a tripod and still have room for a camera, the Flashpoint Camera cage is the most affordable option I’ve seen.
I have one of these on it’s way for testing. I’ll post some more images and info once it shows up.