After diggin the net over the weekend, here's my find:
(description from seller through 'Yahoo Auctions' here in Japan)
Trigon
451 carbon fork
435g
1 1/8" column
for long reach brake calipers
column length 39cm
Price: 26,000yen

Manufacturer's site:
http://www.greatgocycles.com.tw/

For carbon forks in 406, I think the forks on the high-end KHS Mini-velo's are a good candidate. I couldn't find the details on the KHS forks, but there's prob good chance they'll work w/the Swift.

Here's a link to the KHS mini w/carbon forks:
http://www.khsjapan.com/index3/index3-2009.html
(See model F20-RC)
Looks like they're set for caliper brakes too..
If you click on "OPTION", you'll see they sell just about everything separate, just not the forks..

Rgds,
K.