They have them down here, but moth balls and moth crystals are entirely different, each having different ingredients and shapes. The active ingredient in moth balls is camphor, and they are of course ball shaped. The active ingredient in moth crystals is paradichlorobenzene that is ground into crystals. The crystals are also more adaptable for use in the various types of demothing attachments that were available with the Filter Queen and other makes of vacuum cleaners.
Jeff