You can get the colored athletic tapes, etc. at any sporting good's store.
I'd also call around to various Medical supply companies to see if they stock them. They're usually referred to as Durable Medical Supply companies.
You can also ask pharmacists to order products into the store for you. If you have a specific store you usually shop at, see if the pharmacist can order the colored ace bandages for you. I think, though, that you'd be OK with some of the items you'd find at a sporting good's store (as someone who was constantly injured in gymnastics growing-up).
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