I'm looking for ideas on waterproof, nonconducting, strong (can handle the stress of wire antenna mounting points) and "machinable" (I have a Dremel) containers to use as the feed point for dipoles and elevated verticals. It needs to have room for large coax chokes, I think a 4" cube would be perfect, but haven't found one yet. I've turned up ABS and polycarbonate units with rubber gaskets that fit the bill, but not for under $20/piece.
Maybe I just have to shell it out, but figured I should ask here first.