https://bugs.winehq.org/show_bug.cgi?id=42675
--- Comment #17 from Storm Engineer hewanci@gmail.com --- I checked and it seems I was wrong, 4:3 is missing indeed. Pretty strange when the resolution list allows 4:3 resolutions to be set.
Looks like you are out of luck.
On the other hand, 4:3 screens are not manufactured anymore for at least a decade so you have very old screens. I know, why change them if they are still working... but you should consider to upgrade to something modern. I was sticking with 4:3 for a long time but eventually got a 19:10 and it annoyed me for a while but I got used to it and now I like it.
Also, 16:10 for center and two 4:3 on each sides sounds like a nice setup for me, I would like to have that.