Over here in the UK almost every record de-staticy thing is in the form of a brush. I've only used standard ones which seemed to work well for me (my records seem to build up zoo much static) and since that's grounded as well... Well I wish they were easily available over here!
Besides, money back guarantee on it too, nothing to loose!
Sorry I can't be much more use, but I thought I would share experience that brushes do work well, compared to zappers.