I tried to get a 16 bulb inverter from erg... they are not very responsive from what I've seen & was never able to get it.
a lot of these guys are more into trying to get an oem to pick up there product, & have no interest in selling single units, sometimes I approach as a fleet operations manager for my company & I want to buy one sample, with promise of a possible future contract. a hobbiest has much less chance of even getting a reply most times
