Any VW Beetle? The cowl width is 41" measured at the glass, what is yours?
DDG cannot find a picture online, but I have it in a book somewhere: The WWII Beetle SS interior. The left side had the normal two seats, but the right side hasd a fancy full recliner seat set back with a tyewriter self that stored under the glove box, and a machine pistol strapped to the kick panel ahead of the door.
If you want the reference, I can look for it; else no. One of my favorite three seat interiors is in Rod Emory's 356 Notchback. You can barely see it in this picture:
https://flatsixes.com/cars/tuned-por...law-rod-emory/
...but the center rear seat is a child seat with a four-point lap belt! Hot laps with the whole family.