Kanter lists a valve for your car under "accessories"
Heater thermal valve, 1951-54, exchange or add $55.00 deposit $115.00
Tucson Packard lists the valve, too:
HEATER CONTROL VALVES 1941 - 1956
$ 100.00 * exchange
Max Merritt lists them for $125 each, plus a $50 core deposit:
http://www.parts123.com/parts123/yb.dll?parta~dyndetail~Z5Z5Z50000022d~Z5Z5Z5AACHZ~P125.00~~~~S3DK0S0BSY71174123680i~Z5Z5Z5~Z5Z5Z50000022D
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