Yesterday I stumbled across Shoko Miyamoto's Etsy shop, where she sells a bunch of handmade camera straps. Her shop lists about 80 straps of varying fabrics, colors, and sizes (all of which are $33 + $3 worldwide shipping). These are my favorites:

• Glen Check Dark Blue (DSLR | Mirrorless)
• Green Mix Tweed (DSLR | Mirrorless)
• Brown Chidori Wool (DSLR | Mirrorless)

She also makes matching DSLR camera cases and mirrorless camera cases that work nicely with the straps.