The factory VIN plate that came with my Gutzzi was unattached for some reason (imported s/h from USof), so I stuck it on with silicone- after a couple of years, pulled it off to redo the frame and stuck it back on same way, still there 18 years later.
It's basically just a piece of thin ally, so surely you could do the same, with a similar layout to contemporary design, or whatever takes your fancy.
Wouldn't worry 'bout the Trappers- with their resources, they should be able to work it out...?