What door lock knobs will fit our 1968 coupe?

[3 Stangs]

This is a long shot, but does anyone have first hand knowledge on what door lock knobs from any car make and any year will fit on our 1968 Mustang coupe? We are doing kind of a restomod on it and would like something straight & in black like the second pic. Originals are in photo 1. Thanks.

 

[Mcmahst]

I recently bought a set that looks like the straight ones on Amazon, and even though it said they would fit, they wouldn’t screw on. I had a second set end up the same way. I finally bought the ones on the left photo. Sorry, I’m no help.