To find a costume shop in your area, simply do an internet search for “used costumes”, thor costume adult plus your city name. AliExpress is the go-to online shopping app to find everything you need at your fingertips! Sure, you probably won’t end up with a unique, handmade costume, but if you need a costume for one of the more popular fandoms (superheroes, animated characters, joker costume etc) you’ll likely find something that will work.