WOOD magazine had a couple plans for some puzzle boxes, one of which, the Sandfield Box, requires a 1/4"x1/4" rod magnet and 1/4"x1/2" steel pin for the lock mechanism. They sell them online for a buck a set, but I'm building a bunch of these as Christmas gifts and I'm trying to find a source for such magnets, since steel rod is easy enough to find and cut. They look like ceramic magnets, not rare earth, which are too strong for this application. I googled it, but the sites I looked at were kinda confusing and didn't have much. Any ideas?