I'll bet the Cubans could recore your heater. They don't have anything (American) newer than 1955 down there.

I read this thread with irony. I have a complete Deluxe heater, hoses, blower switch, vent cable and knob - everything, and barely got a bite on it when I posed it in parts for sale.
I rebuilt it myself, had the core flushed, cleaned and sealed at the local radiator shop, installed a twelve volt motor, repainted, etc., etc.
No takers. So, I guess the market for these things isn't quite as hot as Denny thinks it should be.