I think it is a good idea, worth cultivating. However, one of the problems might be that many of these shops buy from large suppliers which have sophisticated s

I think it is a good idea, worth cultivating. However, one of the problems might be that many of these shops buy from large suppliers which have sophisticated systems and you will battle to bring them along. However, they might already have web interfaces that you might be able to tap into (think soft drink companies etc).