http://www.leevalley.com/en/home/page.aspx?p=62117
http://www.leevalley.com/en/wood/pag...39&cat=1,43455

Found them, but apparently this stuff only comes in 4' lengths, I need about 5 feet :(
This is gonna be one of those "nuthin' comes easy" days....

Well, the HD one is 5 ft (60.5" ), if you want to give that one a try.

Got a plan "B" :)

you could try windsor plywood

I used the ones from Lee Valley. I have to drill my own holes and stuff, but I've modified the design so that any number of lights are all moveable independently.