This page used to allow you to create a book of square stickers to buy from Moo. Unfortunately they have discontinued their API, so if you want Mosquitto stickers you can use the images and create your own sticker book manually.
Click the logos to choose which to include, then click submit to be taken to the Moo site with a stickerbook ready in your basket. If you choose both logos you will get 45 of each, otherwise you will get 90 of the one you choose.