I've not had a great experience trying to order from him, he doesn't do online orders, so you have to call, leave a message, then hope you can answer when he calls back.
Since he's the US distributor for dynamo stuff, I just ordered mine through
Home - Harris Cyclery bicycle shop - West Newton, Massachusetts which was a lot easier to order through, and get ahold of someone friendly at the other end (I needed extra light mounts).
Don't know much specifically about getting a bike build from him.