kexcelled Real Wood PLA Filament Black Walnut, Real Natural Wood Fiber PLA 3D Printer Filament, High Speed Printing, Dimensional Accuracy +/-, 1 kg Spool (2.2 lbs), Dark Brown
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.