I thing it isn't that much hard to make ... maybe how it would look like when placed down.
What I would do is to grab the concreat image and an image with some copper cable effect, made like a mesh, and then combine those two layers with a bit of transparency or what ever else suits (depending if Gimp or PS is used but both is possible ;) ).
This sould end up in a concreat with copper effect that should then be hooked up into the electric network, to deliver electricity to all buildings, which consuming them.
If you don't mind, I can try to make such an image and maybe it is fine enough to be used in this mod.
For the recipie I would suggest the following:
2x Concreat (normal ones, not harzardous), 4x Coppercable, 1x Basic Circuit Board and 25x Sulfuric Acid should then result in 2x Powerfloor
This would resolve the speed multiplier problem, which you have for know and maybe other problems ;)