Based on the Wolf Tooth B-RAD system which allows users to relocate their bottle/cargo cages & accommodates additional cages as necessary.

There are 2, 3, & 4 set-of-hole variants.

The 2 & 3 hole configurations are part of the same SLDPRT which contains 4 configurations:
- 2, machined
- 3, machined
- 2, printed
- 3, printed

The printed varieties are 10 mm tall to accommodate the locknut underneath. The machined varieties are *very* close to the originals, using the handy PDF provided by Wolf Tooth that gives 1:1 drawings.

4 hole configuration is separate since the patterning is not quite the same.

There are STLs for each of the 3 printable configurations (2, 3, & 4).

Here is Wolf Tooth's product page, with installation instructions: https://www.wolftoothcomponents.com/collections/b-rad-products/products/b-rad-bottle-relocation-and-accessory-device

I imagine the "foam support pad" can be readily substituted for a piece of inner tube.

The B-RAD 3 variant accepts zip-ties up to 3/8" or 10 mm wide, 1.50 mm thick.

Requires the appropriate length M5 x 0.8 bolt, in the quantity required for your application.

The bolt head clearance slot is 3 mm deep, designed for a head height of 2.75 mm. Chosen arbitrarily by picking a random button head bolt which closely resembled the one shown in Wolf Tooth's documentation.

M5 x 0.8 locknuts are 8 mm wide, 5 mm tall.

Pictures from Bikepacking.com