I haven't done any comparisons and I have no idea what they cost but I was given a pair of Maxwell Williams acrylic grinders for a wedding present and the pepper grinder does really fine dust by default (I had to adjust it a lot because I like my pepper chunky).

You might be better off trying a variety of really cheap grinders though, they're kind of BIFL by default? I've never had a grinder break and my last workhorse was a $2 "pepper with free refillable grinder!" from a grocery store (it's still in my cupboard, just replaced because wedding gift)