So I'm not sure if this is considered part of the "body" but I'm restoring my camaro and the driver side door lock works, but the exterior cap part is gone, I was wondering if anyone has had a similar issue, I want to use my original key. Is there just parts I can buy?

 

https://www.hawksmotorsports.com/82-...r-bezels-pair/
these???

 

Looks like there is more missing there than the cap that was linked by @mantaguy ...there should be a little door, or flap that protects the tumblers from the elements, as well as the outer flat piece...
Best bet is to take it to a locksmith with the key. They will rebuild it with the correct parts, and it's relatively inexpensive.

 

Or….you can order a new lock from Classic Industries or one of the other parts shops and have the locksmith rekey it to your existing key.

 

^^
Or this...

 

There's two tiny teenie springs that fit into those holes, or buy this.
https://www.ebay.com/itm/16366241838...4AAOSw3Exg~FXu