Graphite or conductive polymer filament for EDM electrodes?

I was wondering if it were possible to blend in such large quantities of graphite/carbon, copper, brass or other materials commonly used as EDM electrodes that it would still be extrudable and 3D printable into specific, precise shape? I understand that there are currently some conductive, high-metal-content filaments on the market?

Kickstarter metal-filled filaments -- they don't seem to be *aiming* to make conductive filament, but I guess it probably would be.

Protopasta will sell you conductive PLA filament.

Reprint... its still going to be a thermal plastic.. the instant you try to use it as EDM its going to heat up and melt and deform..

Obvious, sure, but this is why I was asking about it.

As stated, 3D printing could also be used alongside to make casting molds like presented in some sources. Where in a casting the print would be melted or burned off, electrodes would be just cast-pressed into 3D printed molds and molds removed when ready. The point is to get the complex geometry tansferred when no high grade CNC is not available.