I'm looking at radiators,I bought a spectra SGT-CU 1553, on line, when it arrived the drain plug was damaged.They sent me a replacement,and it's drain plug was damaged.Sent it back for a refund. I've been searching and most of the radiators look to be made by spectra. Came across OSC Automotive Radiators 1553, they say they build their radiators, but it sure looks like a spectra brand, is it? if not has anyone used this radiator?