EDM Power Supply

I have built a EDM hole drilling machine less the power supply. I
have Robert Langlois book on bulding an EDM machine.I need a power
supply design of greater power than put forth in this book.
Commercial units put out 3.5 KVA at 30A. I think somthing between
the Langlois desing and the commercial is what I am looking for. I
would be interested in either a finished power supply or a set of
plans. I have several friends interested in aquring a machine like
mine when I get it running.

Dale Gash