Mortar and pestles must be more common over here for kitchen stuff; they seem rather ubiquitous. I know what kind of coffee grinder you're talking about, my parents had/have one of those (and it's hard to get a decent even grind with it) and it does kick up some dust as it's going and when you open the top up.
I like Germaine"s finegrain in some situations and have a coffee grinder devoted to just PPD, the stuff is always in big rocks and takes forever to dissolve even with my heated stirrer. Interestingly enough, the Germaine's has a purple color if I dissolve the rocks and a straw color if I pulverize the PPD. It doesn't seem to make any difference in the development....EC