Eliza, one of these? I sort of excluded those from my discussion, though they certainly fit the bill, too. Searching on "pasty crimper" gives a lot of the same pastry cutter results as the other searches... but it does get me lots of pictures of lovely hand-crimped pasties... which reminds me that there's a shop near me in southern California that I've driven by several times and maybe should visit for lunch today it's called "The Pasty Kitchen". (Hubby is gluten-free now, which has put a crimp in my pastry-pasty-pie-eating opportunities.) ;-)

~ Becky in Long Beach