Hello,
Google "Keys For Classics", they are a company that makes duplicates. Not cheap but well worth it. Nice folks too. Got me a second set (Ig & door) for just under $50 delivered. They look like originals and work great. There may be a code on the locks you can reference to supply them. They can then make the keys.
Robert
Hello! I just recently purchased a 1981 lancia beta zagato that belonged to my best friends late mother. After she past, the car was put in her grandparents garage where it sat until this week. It's in pretty poor condition I might say, but the frame is solid and the engine seems clean. The only down side is the fact that the keys have been lost over the course of 20 years. I hope that it doesn't set me back too far. I post pictures here soon.