You can purchase a binder from the following places

GC2B
GC2B is probably the most well known trans-led binder business in the world. Based in the USA, they make a wide range of binder designs in a number of colours and fabrics.
Agnes & Edie
Agnes and Edie is a NZ based and trans led business, which sells a few different styles of binder, along with great quality packers, STPs, and other products.
Amor
Armor is a trans-run business in Australia, specialising in larger sizes.
NOYB (none of your business)
NOYB is a Wellington based, queer-run, one-human business which makes physio-approved, low cost, neurodiverse-friendly binders. They can custom make your binder, usually in just a few weeks. Use the contact form below to contact them.