Please Help to Find a Bookbinding Souvenir in London

So, my wife is on a business trip to London this week. It is mostly 10-hour shifts of controlling marketing research projects, but she will have some free time on Friday and on the weekend. And I’d like her to bring me back some nice bookbinding souvenir!

Do you have any advice on the matter?

It shouldn’t be something fancy, and I’m sure she wouldn’t bother to spend time sifting through piles of things on some flea market. But, maybe… just, maybe, you have some ideas on what that small bookbinding souvenir from London could be? And where it could be found? =)

I’d be very grateful for any ideas and advice.

If you also would like to share your thoughts on other must-sees in London, she would probably not kill me for burdening her with impossible task of bringing me a themed gift =)