Maybe this web site is it (thanks James) but it occurs to me that in any major city there should be room for a store whose MSP is that it sells "everything clockwork" tag line? "no batteries needed"
In a city that has room for a restaurant that serves only humus or risotto then there's got to be room for a store that only sells clockwork gizmos. Maybe I should open one (in another life where I was an entrepreneur who actually got to follow through my "good" ideas ;-)
BTW there is a lot of on cooking rice here if you like the carbs.