Since there's been some questions about Chain stitch Hemming and Darning Repairs, thought I compile a list if you are interested in mail ordering. This is just for the purists though, not a huge deal really. *Have not used any of the below*
Tate and Yoko (Chain Stitch Hemming)
Blue Owl Workshop (Chain Stitch Hemming)
Railcar Fine Goods (Chain Stitch Hemming and Darning Repair)