kexcelled Matte PETG Filament,Grayish Purple PETG 3D Printer Filament Matte Surface,Dimensional Accuracy +/-, 1kg Reusable Spool(2.2lbs),Dusty Purple

Amazon-only with a wide SKU list: PLA through TPU, including silk and specialty variants. Prices sit at the low end; quality is consistent enough for general use.