Nice - thanks for the link.
Only $1.25 plus tax/shipping?
Place a Part Wanted Ad here in the Swap Meet.
Let us know if you find one.
Maybe someone has done something similar.
There was also a accessory/option dual panel-body side set of rear-body side "bullet shaped" dual-filament lamps.
These are sold as reproductions.
They are much smaller in diameter compared to the reflector-lamp you are looking for.
