I posted WTB ads at the various forums. After 6 months or so with no hits, I put up some more wanted ads. Then, in one week, I had three offers to sell. I corresponded with a few sellers and chose one. Note, prices varied from $550 to $700, making my decision fairly easy. I also had choices between the old style pivot and the newer star shaped pivot, numbered first runs and newer models. I paid more than Scott sells for, but not all that much...and I *really* wanted that knife. Voilà! Lochsa in hand. I got very lucky and dealt with an absolute gentleman, Greg aka Raindrop here at the forums.
Additionally, whenever I saw someone post pics of a Lochsa or multiple Lochsas in a collection (or any knife I really wanted to buy for that matter), I'd email them and let them know if they ever decide to sell, I'd be interested.
Lastly, I emailed many of the custom resellers who get one or two Lochsas per year and got on their reserve lists. Some retailers were willing to put me on a list, others indicated that the demand is too high to keep a list, and since they only obtain 1-2 per year, the wait would be several years anyway. Keep an eye on the big custom purveyors, I saw a few Lochsas pop up but always missed them by a day or so.
Scott also brings a few to the big knife shows he attends, but I'd bet they sell out before he gets to his table :~) To find out, email him...just as Tom Mayo mentioned.
A little leg work and you could find one in a couple of months, you just may have to pay a premium.