Hopefully seeing a reply to this didn't get your hopes up too much, as I only have information to offer.
I dunno how many variants there are of each item, but there's a pocketbook and a pocket magazine and each has XX amount of designs which I wasn't prepared for.
So far I have 2 pocketbooks (looks like these are based on the villager hobbies as I have one with plants and one with workout equipment)
and 1 pocket magazine (which I'm guessing is based on the variations of the magazine furniture item, as mine is a comic book).
If you're happy with any old one, then I'm sure you won't have to wait long. If you're after a specific variant...that might be another story lol