Here's a pic of my pedalboard:
http://custompedalboard.com/MK-630-AL-EDG-6.JPG
For the white plastic piece (which isn't very sturdy and has broken on occasion), you can find a brass piece as an alternative. I'm not sure what the exact name or size of these pieces are but you should be able to find them at some sort of hardware store near you.
As for the mic stand, I used one that had a round base (not the common 3-legged stands), and I just unscrewed the base and found some stuff at my local hardware store to fit on there.
I know that seems like a vague description, but that's all I got. I've seen some other similar ideas on other pedalboard sites, but I can't find a link for them. Just use google! Hope that helps!