Dude. The small amount of wiring on the eBay controllers is impossible to screw up. And you can't beat the price. The vast majority of people making them have no experience with electrical work either... it's a learning process, and something this simple is the best place to start.
If you want to make it even cheaper and easier, just get a short extension cord, cut it in half, and use the wiring from there.
There are more than enough people on the eBay temp controller thread willing to walk you through every little step, and you can PM me with any questions if you want.