Hi @shaiss! I brought up your question to the team this afternoon. The short answer is that these accessories are designed for injection molding, not 3D printing. Sorry they're not available for order!
There are some tools available for you to design your own accessories or attempt to approach the ones in the Gizmos & Gadgets kit. You can find them in the Tips & Tricks post for 3D Printed Parts & Accessories
–Product CAD Data *.STEP and *.STL files of different size modules including the bodies of the connectors, so you build around them with micro-precision.
–Vector files with the most commonly used templates (A grid with the bitSnap feet pattern so you can design your own mounting boards, PCB sizes, etc…)
I hope that helps!