In searching for a 20" carbon tube fork with disc brake tab for my folder (similar to White Bros. and Pace rigid MTB forks), I came across a company out of Singapore that may be willing to produce such a fork. Here is an example of of their 26" fork on eBay.

http://cgi.ebay.com/eXotic-Rigid-Car...2em118Q2el1247

If you are interested please go to this site and show your interest:

http://www.discobrakes.com/?s=1&t=0&...391a97415362d&

The post is in the CarbonCycles.CC section of the forum. You will have to register to access the site and post.

The site is a little strange in that there is NO contact information. The only way to make contact is through the forum or possibly through eBay.