zman308,
You could order them like Randall Made but, you'll have to order from the Busse Custom Shop, I've heard that prices start at about $100 per (blade?) inch and the waiting period is from two to ??? years. Cost and waiting period depending on partial or full custom knife requested and some things are not available at all, such as snakeskin micarta. ( Jerry is out of that, isn't he ? Or is he saving that for the ASH-1 LE? I would think that he'll offer tiger micarta for the ASH.)
Secondary markets include the Exchange on this forum, 'that auction site', some of the knife shows such as Blade West and some of the gun and knife shows like Knob Creek. Busse knives are not easy to get and some older and more desirable models are nearly impossible. Good luck, happy hunting and have fun. Pete