it's a sucessful design and all indications suggest it will continue on. it may get made by another shop, or continue on being mmde by Rowen. that would seem to be simplest answer. RYP mentioned it might be available in stainless and non magnetic versions, but i'd expect it to continue to be made in carbon steel, simply because of a cost/benefit thing.
soooo, the knives that have already been made will probably last a while longer.. but if you really want a backup, there's nothing like actually having it in hand.
take your time, quickly.