Printed by u/cosmin_c, his design.

More pics here of the stands :)

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Edit: these and the ones that u/rulz-ro posted are basically the IKEA white colour, but depending on preference they're printable in any PLA one wants - or ABS (smoothable by acetone vapour) or resin. Unfortunately I'm still working out the kinks of clear resin, unfortunately I haven't yet produced a satisfactory clear white/frosted one yet albeit plenty of tries, I've yet to pinpoint a good resin and processing process that would yield satisfactory results (still working on it).