If you have the handles they should be able to replace the inside of the locks replaced and get a set of keys with the new guts... Any GOOD (not the Home depot guys) locksmith should be able to handle it with no issues. Don't be surprised if he has to order an insert.
Some of the handles had a key # stamped on them --a key can be cut from that code.
Some locksmiths can look inside the picked open lock and make a key from looking at the position of the wafers ---sometimes it takes some trial fitting.
You might have to try several locksmiths before you find one you have confidence in.
If they are original, they will have a number on them. If they have a number, A&L in Conneticut will do a fantansic job for you. Just tell them the numbers, and they can make a key, and mail it to you! Check the top of the page for the Venders List.....