Surly(like many firms) is more of a design studio, not a bike company. The things they sell, they have bought from others. Some of these things are items that they've designed and commissioned others to make for them; others come out of some weird maxway-style catalog. The crowns like these are found on the forks of many taiwanese bikes; i clicked on the link, expecting to see the raleigh one-way or whichever Raleigh has the fork that looks just like my LHT.
-rob