OpenStreetMap Integration & UI Refresh

The website lets visitors paste a Wi-Fi MAC address and instantly see where that router was detected. Right now the page relies on Google Maps; I want the same experience rebuilt around OpenStreetMap (Leaflet.js or a comparable OSM JavaScript library is fine)... (Budget: €30 - €250 EUR, Jobs: API Integration, CSS, Frontend Development, Geolocation, HTML, HTML5, JavaScript, Web Application, Web Development, Website Development)