After a while being looking for a support to mount my air pump 2 on my bike, i can't found anything. So i decided to create my own, i printed like 5 or 6 different with little variations and i think this worked good.
I am not a professional of the design and 3D printing but is tested by me and my MTB and i can say that it works.
Additional you should add a hook and lopp fastener to avoid the up and down movement of the pump (do it or the print lines will scratch your pump, it happened to me) that can happen just in uneven ground, i think if you just use it on the streets you are safe.
Use 100% infill (You can only use infill on the back part where is the screw zone, the rest of the model is to slim)
I printed it on PLA and works good, but soon i prefer to print it on PETG to make it stronger.
Use normal supports it is easy to print.
Please share your results i would like to see them.
The author marked this model as their own original creation.