Goodwill, Salvation Army, Deseret, Value Village thrift stores. Most cities and towns of moderate size have vintage clothing stores...then there's garage/yard sales on the weekends...not to mention the multitudes of on-line costume/playa clothing outlets.
I don't sew...so I buy! There's also the on-playa boutiques...Sex Filth Avenue (vic Terminal Village), and Black Rock Boutique come to mind.
Don't bore your friends with all your troubles. Tell your enemies instead, for they will delight in hearing about them.