I have a Bravo Concealment OWB that I love, unfortunately I'm a lefty and they don't make a lefty IWB for a Glock 48 yet but I've seen good reviews (on the right-handed ones). They seem to be good quality in general. I currently carry my G48 in an off-brand IWB kydex holster...single clip style. Single clip IWB holsters appear to be a dime a dozen and there are a hundred different companies that basically make the same holster. I can't imagine there's a ton of difference in them.
Something along these lines...