It's all speculation without pictures but I can tell you that a lot of the extremely high end stuff from Europe did have canvas bodies or at least partial canvas bodies. Some (very few) even had concave or convex glass as well.
It is highly unlikely but check out old Rolls Royce, Duesenberg, Bentley, Bugatti to name a few.
If it is one of the ones listed above provide a location in a private message as well
One can only hope