Well that solves that problem. I only have a few hundred mg of CuCl2, but someone just posted a writeup for doing it on a 10mmol scale, and it seems I only need 260mg of the cupric chloride. The electrolysis of copper metal in concentrated (98%) sulfuric acid is going miserably, the car battery charger just isn't providing enough voltage and current to form CuSO4 in useful quantities by the end of today.
But I'll run it in a microscale setup, maybe increase it to 20mmol, depending how much CuCl2 I have left.