Eyepiece / filter cases: Any good ones for individually purchased ones?

Seems like Reddit is limiting post titles to 80 characters? Even though the char limit says up to 300? Is this new?

Anyway, as the title suggests, I never bought any of the kits that include a handful of eyepieces and filters, I've only got a handful so far that I've individually purchased and was wondering what your solutions are for storage and transportation. I wouldn't mind having some hard-case options like you get with some of the nicer kits, but do they even sell ones that are like, empty aftermarket cases, or...?