Fhilo did hook me up. It's 50' of 1/2" ACR copper. I got the elbows, garden hose fittings from him too. I think it was about $55-60 for the materials. I built one for me, and one for my brother-in-law at the same time. It took an hour for the 2 of them.
I was using a pump like the one from OBK, but I've since upgraded to a Chugger that I bought from Hopdawgs.ca. It's a much better pump. I still have that old pump, but I haven't decided if I'm going to use it for anything or not.