I carry around one 72mm filter (a CPL), and I'm looking for a good, small case to protect it, one that I can put in my pocket.
What I'm envisioning is hard plastic with a foam insert for the filter. Many filters come with such a case, but mine didn't; it's a nasty one and the filter rattles around all the time.
I've poked around but have found only cases that carried many filters, weren't hard-sided, or both.
Can such an item be obtained without a filter already inside it? And if so, where?