I have a CSL dual 28 watt ballast. Unfortunately, when I plugged in a "hot" bulb into one of the sockets while it was on I heard a pop in the ballast - apparently killed it. Because the other half of the ballast is still functional, I was wondering how I could replace/repair the non-functional half. Can I buy a replacement component myself on the web? I believe CSL charges $50 for this job and I would like to save some money.