I recently had a tank for my Le Mans made by John at
www.thetankshop.com in Scotland.
Very, very beautiful work, fair price, but it took a year. Seems that if you want the handcraft, this is how long it takes regardless of who actually makes it. By this I mean that I know of several other people who will make an alloy tank, but they all take a year or more.
good luck,
John Ferguson