I found the excellent toolbox from @yun-ing but added a few things to fit my needs:

• mirrored the model as it's easier to take the spatula with my right hand
• added a hole between the cutters and the needle for the grease tube
• added a small square hole to hold a pair of tweezers
• added embossed text for the hex keys
• changed the bottom to have only holes for the notches, removing the need for supports