If you mean where to get the best triple tree forks, I would say Lawless are pretty awesome. If you just want the best place to buy inexpensive triple tree forks made in the Far East, then just shop eBay.
There are several versions of the fork in the first post, quality wise. A fellow builder bought the best . He said that in order for the rockers to pivot freely , there was too much play ( slop ) in the front end. So he kept the rockers so tight that there was no spring action .