Side Mirrors for '67 4.2

I am trying to find period correct but usable side mirrors for my '67 e type 4.2 2+2. It currently only has a driver side mounted on the door (and rear view mirror). The holes measure 4" from screw to screw. Will try to post a picture but its essential worthless. I’d also like to add something on the passenger door as well. Hoping to reuse the same holes unless there’s a better solution.
Any thoughts on a supplier and mirror that looks somewhat correct and is usable ??
thanks
Dan

Here’s what I currently have:
thanks for the help and stay healthy !
DanIMG_5613

If you just want a functional one, I use a bike hand back mirror. Fits on wrist in place of a watch. No drilling required.