This model allows you to have a bottle cage and a hand pump holder in the same bottle cage mount. Model includes a slot so you can secure your pump with Velcro (hook and loop) so you can take it mountainbiking, mount it on a race bike or an e-bike.
The design is for a hand pump with a diameter of 24mm and a bike tube with a diameter of 35mm, but the model is linked below so you can modify it yourself.
I made the original CAD model in Onshape and that's available here
https://cad.onshape.com/documents/e9444b459939d3036646917c/w/e00059635d183a38622cf68a/e/c1c8b6f867596232d6aa4db9
Let me know in the comments if you need a specific file type and I can see if it's available for download.
I printed the model in PETG standing up without supports. Maybe you need a brim for adhesion. Model in the photo was printed on Prusa MK3S+ with 0.20mm layers and about 5 perimeters for strength in just under 2 hours.
The author marked this model as their own original creation.