Topeak Road Morph G users, where can one purchase a "beside-the-water-bottle" mount instead of the "replaces a water bottle cage" mount that mine came with?

I had two other (different brands) "beside-the-water-bottle" mounts. One was too small and broke when I attempted to put my Road Morph G pump in it, and the other is larger so, even with a velcro strap, the pump is too loose to carry on it.

I want my second bottle back!

Thanks.