Where to buy copper slug for Hydra?

With all the talk of replacing the fuse with a copper slug, I would like to try it for myself. Anyone know where to find an appropriate one? Thanks.
Shunyata has a new fuse that they ssy sounds better than the one used originally on the early units and I would go with that........Oh, Mothra Research makes a slug, but it is a bit larger than will probably fit the unit, but see the following:


The entire Mothra site is full of things of interest, especially the section "Recreating Life" :-)
Take the fuse to an electrical supply company and they will be able to get the copper slug that will work for you.
Go directly to Shunyata for the copper slug, as I believe they carry it.