The basic sheet metal should be identical between the a same year convertible and sedan, however the window glass and some of the other bits will be different.
If you’ve got a 64 you can use the doors from a 64 or a 65.
Mario the Lincoln Guy should have the parts you need. 760-646-7996. You can also email him at [email protected]
As far as I know the sheet metal bits are the same and the differences are just in the misc. bits like the windows and tracks. There might be some minor differences with switch mounts – convertibles lower the windows when the rear doors are opened – but otherwise you should be good to go.