For anyone, like me, who bought the Atomstack roller without the glass rim holder attachment, here are the files I have designed for that purpose. These have been 3D printed using an FDM (FFF) printed and printed at 100% infill for strength. I have designed the bottom stand in 2 pieces for ease of printing. The two parts will need supergluing together. The other items you will need are listed below.

2x V Slot Wheels Plastic Pulley Linear Bearing, one you get with a Creality 3D printer. 2 x Black stainless steel penny washers (M5 x 15 mm). 2 x Aluminium stand-off spacers M5 x 5mm. 2 x M5-0.8 x 12mm Alloy steel button head socket cap bolt. 2 x M5-0.8 x 25mm Alloy steel button head socket cap bolt. Rounded thumb nut connector lock adjusting nuts, M5 female threaded thin.