YnZs Yesterday's Parts has reproductions of the power window switch connections. When I bought a new power window and lock harness for my 1956, it came with them installed but they are available separately too. If not listed online, ask them as I know they've reproduced them and are probably the only ones to have done so.
I may also have a good used one so if you have no luck, let me know by PM and I'll check when I go to my shop in a couple weeks.
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