Here are pics of the one i fabbed up, its not to difficult to do. Could substitute the rods for all thread, and side pieces for a wood brace of some sort.
heres the one from Roadglide.org (guy named Wheelie)
seems to have a mount for everything detachable you have for your bike as well as Helmets, clothes , sunglasses etc ....I have one on the way myself.....
Just a few peices of plywood and 2X4. Put some old rags or cloth on the skids so the underside of the tourpac doesn't get scratched.
Hey Eastern, I know it's been a while, but could you repost those pics(s). I need something that I can move around. I have a vinyl shed and no wall space to mount to. I am considering your method.