Although based in the United States support sanity.org will ship individual or small orders of lapel pins, badges, stickers and a range of other items.
Their website is www.supportsanity.org
At the time of writing a pack containing one lapel pin, one ‘button’ and one sticker costs 5.00USD. Shipping is an additional 5.00USD.
Shipping a pack of five of each item is 8.00USD
Shipping a pack of ten of each item is 13.00USD