Hey,
I'm not that close to where OBK is, but can get it shipped from them. They used to have free shipping, but don't think they have it anymore. If no one else can help you out, I can try and help.
Lol, I built it myself with off the shelf parts. I did not use a special adapter to mount the taps to the pipes. The nut that came with the shanks is what I used. It fit into the space of the smaller bushing, and I was able to tighten it. Everything on the keezer was off the shelf products and I...
Hhmm... might've misinterpreted your question. I built the keezer, bought the pipe tower parts from home hardware and assembled it myself. There are some towers in this thread that were machined to spec, and I thought you were asking if I had machined the parts myself.
Bought it. 2" pipes all the way around, then used a 2"-1-1/2" bushing, and attached a 1-1/2"-3/4" bushing (reduced the 2" hole to a 3/4" hole). The shank was put through and the nut fit into the smaller bushing as I screwed it in.