Upvote:3
Now I imagine trying to pass off a passport as something else is illegal. But that just a cover that resembles the real thing would not be allowed seems very curious.
Looking at Amazon.co.uk, passport covers resembling a British passport are plenty available (might be your tailoring that is not making them display, example of one)
Searching at Amazon.com for passport cover, it yields quite a few for US passport
Same thing for :
Searching for passport cover on AliExpress has those kinds of designs on the first result page (funny enough, searching for fake passport leads to even more of those products appearing)