I think most of the vendors (Jim Carter, Classic, etc) sell repop locks keyed alike. OOPS, I just did a quick search and didn't find anything except single cylinder/keys.
The other option is to take them to an old school locksmith and have two of them rekeyed. If you take the lock assembly out of the door, there will be a key code stamped near the stem going to the latch mechanism. With that code, you can get a key made to fit it and the ignition and globebox locks rekeyed. As a point of interest, the glovebox lock only has 5 tumblers as opposed to 6 like the door and ignition have, so would be easier to rekey to match one. My plan is to get the glovebox rekeyed to match the door lock and have the ignition different (being a cheapskate).
