Jeff and Pat,
I know Marlin Uhrich made some reproduction kerosene car lamps for the Colorado RR Museum. From what I saw they turned out nice, but they were expensive.
I don't know if anyone will want to use Marlin after the drubbing he got in the thread about the WP&YR #69. I'll not comment further on that but the lamps and some reproduction car heating stoves he also made for CRRM looked good to me.
You might contact CRRM and ask them what they thought of the lamps.
Phil