The Choke Diaphragm Bracket Screw? Are you set on an OEM replacement? Most hardware stores with a decent selection of fasteners will have a screw that will work, it's not metric.
OEM would be nice, but it's not a deal breaker. I can go to a hardware store easily enough, but thought if someone had some parts carburetors I could get an OEM screw for a few dollars.
Your photo appears to be the right front corner and the screw I need is on the right aft corner, HOWEVER, after inspecting my base plate both holes look to be the same and that screw should work perfectly. DM incoming and I really appreciate the help.