I have a number of Grip6 belt buckles and straps.  I've had their official belt hanger for a while, but wanted a way to store the belts seperate from the buckles, that way it was easier to just grab a buckle, grab a strap, and put them together.  Whipped this little design up several months ago, just never got around to uploading it anywhere.

Designed it to print in two pieces lying flat to increase overall strength.  The tolerances are quite tight where the two pieces slide together, so there's a chance you may need to sand a bit to get it to fit.  Printed just fine on my X1C with .2mm layers.

If you can think of any changes you think could help the model, feel free to let me know.  I'll probably tweak the design a little bit to make one that has a hook rather than a ring to hang it on, and upload that in a day or two.