Bought one of those Steam controller skins a while ago, looks pretty nice! : r/SteamController
Amazon.com: MightySkins Skin Compatible with Valve Steam Controller case wrap Cover Sticker Skins Golf : Video Games
Gussy up your Steam Controller with these new skins – Destructoid
atFolix Personalised design film compatible with Steam Controller - simply design your skin sticker in the custom configurator yourself: Amazon.de: PC & Video Games