Thanks, guys, for all of the input.
augidog, I was pleased when I saw it was a 15mm bayonet - that's about the best socket for a good range of bulbs. (Been watching the trailer thread too, I've just had nothing to contribute.)
Paddy, I thought about asking if the lens was plastic, but I guess I have the answer to that one. (I'll take it off my 'watch' list.)
I want to avoid plastic sockets, too. Been there, done that, like augidog.
I'm in no real rush and just keeping my eyes open as I work on the charging system.
Everything that looks good goes on the list.
I've already exceeded the budget for this week. $60 for the motor/generator, $70 for a miniature 25mm gear puller, $30 for mini allen keys, $20 for motor coupling. (And I've hardly started, still have timing belt & pulley, permanent mounting, then the regulator to sort out.)
OT for a moment, I tried to reply a few hours ago, but this old computer crashed, (reset with no warning), midstream.
Been doing it for a few days, and giving me warnings that the 5V rail was at 4.3V.
(PSU tests at 4.98V with my DMM)
I just stripped it and hit it with the vacuum cleaner. Monitoring hardware/software tells me the voltage is 4.65V again and all's well. (It's always indicated about 0.3V below the real voltage.)
Got me stuffed - I was all set to order a new PSU. I wouldn't have thought a little dust would make so much difference.