PA-30 generator control

[steen]

I have a PA-30B with original 50A. dual generators. No, I don't choose to change out to alternators, thank you.
What I do wish to do is change out the old electro-mechanical voltage regulators to solid state Zeftronic controllers.
My current vr's are Electrodelta VR300-14P-50, and the parts manual shows Piper #450385 and Lycoming #72077.
The Zeftronic web site seems to not be up to speed with improvements coming so I have gone thru Aircraft Spruce &
we failed to come up with a solid-state pair of controllers for my plane.
The reason for the change-over is to be able to install a gel battery which requires closer tolerance control than I have now.
Anybody have info I can borrow?
Steen