Electrode holder

I' m interested if anyone has made electrode holders and fixturing
for there EDM machine and would you be willing to share how your's
was made? I'm trying to come up with a changable tool holder, but
being a 1 man shop I try to make alot of my own stuff, alot of times
you can't afford to put out the cash for the commercial stuff.
Thanks,
Richard Konnen
R.E.K. Machine & Mold