Seems that the 30g advertised key force is bogus.
Ah, that was true, but is not true.
Actually, they announced that the keys are all 30g at first, but due to some error in manufacturing process, somehow the usual "differently weighted" rubbers in Realforce got mixed in some of them (so they basically were just another Realforce91UBK with different logo) and the "defect" products were recalled in January 2009.
Current model is all checked and certified, but still it's not so popular thanks to the price, I guess.
Oh, and one more thing. While the discrete keypad of Epson's has been discontinued, the "business full keyboard" set (BFKBPS2R) seems to be still available, in a price you don't want to think about.