I was right at the beginning of taking some portrait shots of my JROTC cadets when my SB600 made a very loud pop. I assume that the build blew. I have researched and found several youtube videos describing how to replace it, but the only place on line I can find the bulb is eBay. I really don't like eBay, does anyone know of a supplier, or I would even consider sending it off for repairs. I live in the sticks so there is not a local shop that I trust. Seeking suggestions.