Bill,
Thanks very much for your reply. I'll continue to hunt for a rebuilt or NOS solenoid and relay for this thing. In the meantime, I was able to find a replacement for it from a place in San Antonio. It's got a different design, but it will work. The source was Texas Industrial Electric Co. (in San Antonio). The part number is a Delco 7-929. The cost was about $30.
Thanks again,
Ken Karrer 1941 6227D coupe