So if I want to keep the original door handles on my 37 and I don't have the original keys, can I get the locks replaced somehow?
Just take the lock cylinder in to a good locksmith and they can make a key that fits. Did that exact thing on my 38 Chevy, should be the same type lock as your Olds.
they just put a br*** or plastic key in it and wiggle it then file the marks untill it works cost me ten bucks ten years ago