You guys over-think this. Surly sells their Disc Trucker fork in black, for 26 or 700 wheel, for as little as $90 shipped - less than you can make them. Buy one, ride it - it works, looks good too. Crown rack boss is a neat feature.

Let Tange do the hard stuff (maxway makes the frames, fork steerer is branded tange).

http://classic.aebike.com/product-li...5-m27576-qc30/