i'd start by plugging "key blank" into your favorite search engine. if that fails you horribly, you can buy brass all over the internet: http://www.onlinemetals

i'd start by plugging "key blank" into your favorite search engine. if that fails you horribly, you can buy brass all over the internet: http://www.onlinemetals.com/ http://www.onlinemetals.com/ https://www.metalsdepot.com/ https://www.metalsdepot.com/ mcmaster-carr, or amazon. i suggest a pair of calipers, too.