Do you guys have any recommendation for manufacturer (3d printing included) of hollow / concave bases without the wide lip? I ordered some 25mm and 32mm from Green Stuff World
https://www.greenstuffworld.com/en/hobby-accessories/1624-hollow-plastic-bases-black.html but they have rather limited offering of sizes. They don't make round bases larger than 32mm. After some searching on Google, I found that there should also be hollow bases from Beveled Edge but those don't seem to be widely available in
UK and they are quite expensive - almost 10 GBP for a single 105x70 seems to be quite lot considering that it is not even a scenic base.
I don't own 3d printer myself so can't print them myself.