That's how my squadron's latest custom Airwolf came about.I'm no expert but I would say most of the limited editions are put together by squadrons or the like and are offered around the members of the unit in the hope of getting together enough (the minimum is 50 i think) to get a run done.
---My B-1 was one of 60 produced. I like the new custom Airwolf as well. The new push from Breitling seems to be the Aerospace now. Great offer price and they are done extremely well.
If you troll ebay long enough you will find them pop up every so often.