Eco-friendly tree tubes?

Does anyone know where I can get biodegradable, plastic-free, or otherwise eco-friendly tree tubes for planting anywhere from 20-100 trees?

I am finding plenty of places (Vigilis-Bio, etc) that are apparently biodegradable but they seem to be for wholesalers only or something, as no place actually sells them and the website just has an option to “enquire for more info”.

Miracle Tree Tube at least purports to use recycled plastic, but I am cynical and would prefer to use something with no plastic.

I could also just make my own rolled hardware mesh guards but I’m not sure if those are particularly eco friendly either.

Thanks in advance