Did you figure out what parts you needed, or do you still need help? I just built mine from scratch using 16 single LEDs. I am going to install it this weekend if it stops pouring rain.
Here's the switch I used:
http://www.parts-express.com/pe/show...number=060-780
It requires a 20mm hole, and you can find 20mm drills on amazon.com for under $5 shipped.
If you prefer a different switch, here's one:
http://www.parts-express.com/pe/show...number=060-335
If you can find a shop to do this for you, I would be surprised if they charged less than $100. My parts cost about $8. Wiring and installation is easy, once you understand the basic layout.
If you need a wiring diagram, just ask.
