I have a Wilderness Energy BL 36 converted mountain bike. I would like to power a Sirius Satellite Radio receiver, mini amplified speakers, and some LED lights off of my 36v SLA batteries. The Sirius receiver takes in 5v 1.5A. My mini speakers take 4 AA batteries, so 6v. I'm sure I can find LED lights running at 5v or 6v. I think all of this should be able to run on 5v or 6v. I have a lighter-socket 12v to 5v DC-to-DC that came with the Sirius receiver so it can plug into a car's 12v which I can use. At some point I might upgrade my bike to 48v. So I am looking for a DC-to-DC converter that will handle 36v or 48v input, and output either 5v, 6v or 12v. Any reliable suppliers for such a converter?