Pretty sure I had at least one vendor say they they've been waiting for orders they put in last January, so the shortage has been going on even longer than you would think. Dan Bailey's is the US rep for Dai Riki, and they have no ETA for new orders. Lots of shops seem to be dropping them as a result of the shortage.
Dai Riki makes some of my favorite hooks, and at least one style of which would not easily be replaced by the numerous generic no-name brands out there. Hopefully they will be back before my stock runs out, but the amount of business they are losing as a result of this shortage must be significant.