Well, the mod was dirt cheap, but I think that was due at least in part to the fact that it was first time he did this. I'm guessing for the mod and a power cable would be fairly close to your offer. Marc would hook you up fair, for sure. I'm using walmart lithiums with one of Marc's VR boxes, but I'm sure you could use it with any 9V source. I'm not really sure what the voltage tolerances are for the SVU's.