Who decided the car is totaled ?
https://www.hemmings.com/classifieds/dealer/dodge/dart/2475451.html
https://www.hemmings.com/classifieds/dealer/dodge/dart/2472769.html
https://www.hemmings.com/classifieds/dealer/dodge/dart/2463964.html...
https://www.ebay.com/itm/161009041115
https://www.ebay.com/itm/Steel-DOM-Drive-Shaft-3-5-OD-with-1310-Solid-Cross-U-Joints-up-to-62-c-to-c/152320708141
there are probably others.
You may be better off getting a later model set of locks. they are flatter a lot cheaper. BUT you will need to do some filing on your doors to get them to fit. they are the same size, but they are slotted differently so it isn't too much work.