We do not currently have plans for a 2.85 mm or 3 mm filament version of Palette/Palette+. However, depending on what printer you have, there may be a quick fix!
We offer a conversion kit for LulzBot printers. Learn more about this here.
If you have another brand of printer, you could share more about your printer & intended uses at firstname.lastname@example.org, and we may be able to point you in the right direction.