Carburetor lid “air horn” gasket for a 4100

[Lorkowski]

Rebuilding the original 1959 4 barrel ford / autolite 4100 carb.
The lid gasket has an extra hole by the center air cleaner stud.
This appears to be a passage for the new model 4100s.
Problem is, it will leak vacuum at idle as it lands right in the middle of the divider wall.
Is there a proper gasket for these early carbs? I cant seem to find one.
Should i fill it with something?
When disassembling it had the same incorrect gasket and hole for what thats worth.

[Lorkowski]

Update*
NOS Ford Carburetor Gasket Kit C2SZ-9502-A Has the correct gasket if you can find one.
The part number for the gasket itself appears with the extra hole everywhere.
Either the parts book has the wrong number or someone took the liberty of listing the newer design under the old number and nobody seems to have noticed or cared.

[Lorkowski]

Well the noted gasket above is correct, but the two I located both seem to have shrunk, and oddly in only 1 direction. 1/16” too skinny, but a perfect pattern. Purely guessing, but are these rubberized and have a paper fiber grain direction? Or could be a bad batch and thats why they sat on a shelf since 58. Any way to expand these?