I have a Sharpmaker, actually a predecessor to the Sharpmaker which I bought at a State Fair in the late '70's. It came with "fine" rods only, and the base holds them at only one angle. I've ordered a pair of "medium" rods from spyderco.com, and would like to get the current base that holds the rods at two angles. The bases aren't listed on the Spyderco website; are they available seperately?