I would have thought that if the damage is confined to body work there is no need to seek out specialists. On the other hand if there may be any possibility that the high voltage system is in any way compromised or may be affected by the repair then stick to the specialists, at least to get quotes and discuss the implications.
My friend had a low impact bump back last summer - insurance wrote his MY'13 electron off. He got his local bodyshop to fix it. No need to disable anything HV related when you put it in a low-bake. I'm pretty sure all the details related to paint booth preparation are in the repair guide: