SKU 4625000 or SKU 1088603 work perfectly for the lower glass on these mojia ones (the white o-rings are slightly thicker, thus 1mm smaller but the difference lets the bubble tank seat better too.) I only know mine are mojia because it said it on the bottom of the box it came in, there are kindbright and unbranded ones out there too.

I would still say SKU 9648995 (or SKU 9648994 if you'd prefer silicone), it's a good range around the one I've got and if it winds up being too thick you can do what I do with the white oring, go a size or two smaller so the stretch thins it a little.