I created this GridFinity Modular Hammer Rack to store my hammers in an organized way.  Each piece is a 1x1 block that interlocks with its neighbor through sliding dovetails (tolerances are tight, so it may require you to tap it together with a mallet or a hammer + wooden block).  You print one of each end piece plus as many middle pieces as you need to store all of your hammers.  This works with any hammer up to a 1.5" face and uses about 36g of filament per hammer.

I have also added a 2x2 with a larger cutout for larger hammers or mallets.  This includes a separate handle holding piece so that the handle and head properly align.  This uses about 97g of filament per mallet.

Note: the tolerances on the dovetails is quite tight.  You will need to use a mallet or hammer and a piece of wood to tap them together.