I got a call to do some exit/emer maintenaince in an apartment building. They had a fire marshall inspection and some of them did't work. I was called to fix them. This should be an easy fix, except that they were all wet location signs and lights with tamper resistant screws. I spent two hours finding the right tools. I changed all the batteries and there was one bulb that was bad.

My problem is that I cannot find the replacement bulb. It is a MR16+c 6v 5.5w. I just get funny looks at rexel, ced, ces and graybar, all our local suppliers. I went online and ordered what I think is a match but it is on backorder. Have you guys ever seen these bulbs.

My second question is disposal. I know some of you will say to just toss them in the dumpster, and I have, but what is the best way to dispose of the sealed batteries. I also have some hps bulbs to get rid of. I'm not an environmentalist, but I do believe in doing what I can to save some drinking water for my kids.
thanks