ANLEOLIFE via Amazon has 1-Pound 065″ x 370′ Commercial Square String Trimmer Line Donut w/ Line Cutter for $8.38 after applying promotion code 50CUTLINE at checkout. Shipping is free w/ Prime or on orders of $25+
Also available (prices after promotional code 50CUTLINE)
1-Pound 080″ x 557′ Commercial Square String Trimmer Line Donut w/ Line Cutter $8.44
3-Pound 155″ x 280′ Commercial Square String Trimmer Line Donut w/ Line Cutter $15.49
5-Pound 095″ x 1280′ Commercial Square String Trimmer Line Donut w/ Line Cutter $19.49