Bought a used aquarium, wired with four T-12 tubes and a ballast, over a 68 gallon tank. One of the pins in the tube bent/broke and the entire thing arched, and burned one of the round caps out. Of course, the unit won't even light when one bulb is out. I've been all over and can't find anyone who carries this part, as it has no manufactuer name, and is/must be very specialized. I'm desperate to get my lights in the tank up and running. Does anyone have one of these I can buy - or know where to get it. Thanks much!