Stamping Bread Rolls
I use a Paul Hollywood Kaiser stamp (see above) and it works really well.
It's hard to buy other stamps from outlets in the UK. It seems to be big business in the States and football stamps and spiral roll stamps seem readily available. However, the postage costs to the UK are horrendous. Stamping bread is also very popular in Uzbek cuisine or in Mexican concha cookery. It's all a matter of keeping your eye open as you shop.
However, you might want to experiment with the stamps you might have bought at some time to make cookies or gingerbread men.