kexcelled Glass Fiber PETG GF Filament Brown-Green, High Stiffness, Durability, Weather Resistant, Matte PETG-GF 3D Printing Material 1KG, Fit FDM 3D Printers

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.