I’m trying to help a friend power some lights on the cheap. Light theft is a big problem here, so I want to avoild a battery powered removable light. It seems like a bottom bracket dynamo might be the best route since building a new wheel with a hub dynamo will be expensive. She’s also small, so keeping her modern, light weight, 20 spoke wheel is better than throwing on a hearty 36 spoke touring wheel with hub dynamo. The only problem I’m having is I can’t seem to find a BB dynamo... Are they still made?