Yes, a caboose is a different animal. I have a couple from MTH that I have not yet looked at, but have heard may have similar lights to these. Not sure what I will do there either, but they are in the plans to convert to LEDs someday? Maybe one of GRJ's passenger car lighting boards?
You should be good with the floodlight LEDs. My floodlight is Lionel. My LED leads were definitely larger than the old bulbs wires, but I got them in there alright with a little finesse. Just be careful and they should work fine (but with a little tighter fit in the socket).
I understand your frustration about the 'direct replacement' parts. Seems almost everything is somehow slightly different these days.
