I made this in Fusion 360 for my forstner bit set. The ones already available either didn’t fit what I had, or had duplicate spots. Also I wanted walls on the sides to keep the bits protected and from snagging on my hands.
 

Updated 6-19-2025: Improved sturdiness of design. Bin wall thickness increased to 2mm, and increased size of fillets where the walls meet the top surface to prevent cracking along this edge. Also improved the ironing settings in the print profile. If printing in PLA and on a P1S or X1, leave the door or top lid open. This will greatly help with getting a smooth top surface during the ironing layers (the chamber can get a bit too hot for PLA to come out perfectly smooth)