Kosher World in Far Rockaway – depends on where you live in FR, but it is possible to walk there. Also, KW delivers. Brach’s in the Five Towns also delivers, I believe. But probably no deliveries on Erev Shabbos.
Yes, there are buses, but it’s a schlep, and again, depends on where you live in FR. But at the same time, there are buses – you can get to Brooklyn or Queens, and even into the Five Towns.