[ecope]

That's what I will probably do just order a couple of sets to have in case I need them someday!

[joeavaerage]

Hi,
the traditional material for worm gears and nuts is Nickel Tin Bronze.

You could use any number of bronze types and still have a great result, any of the Aluminum Bronzes (Aluminum-Nickel, Aluminum-Silicon) would work well
as would Phosphor bronze or even Manganese or plain Tin Bronze.

Craig