This here is a wall mounted spoll holder I made for my H2D to be able to feed TPU directly in to it.

It's simple design with a removeable dowel that has two 608-bearings in each end.

I recommend you print the spoll brake to prevent the spoll from unspooling unnecessary filament that could potentially end up on the build plate and get tangled in printer itself.

Added some hexagon for a extra flair, it also saves on filament.
I included the step-file in case you want to make changes to it to fit your specific needs.