Been there,take the passenger door lock out and get a key made for it!Good suggestions. On the '40, the ignition key opened the passenger door, so I took out that lock cylinder, for the code off it, and gave to an old time locksmith who looked up the numbers and cut a key for the ignition with them. The old one was so worn out, it wouldn't work. The code might look something like this; FK799, he looked it up on lockcodes.com, and it gave the cuts, depths, and key blank #s.