You can use a water rinse in place of a stop bath. You may need to reduce your development time slightly as the developer will remain active for longer during the water rinse than during a stop bath.
I don't know what stop bath you have been using. Ilford makes a low odor stop bath (IlfoStop) that is basically citric acid (widely used in cooking) with an indicator dye to show when it has been exhausted. You may find that you tolerate this better, since it is not very volatile.