New Social Media Icon & Search Box Border

Two questions... The first is in regards to the social media icons in the header. I currently need a blogspot social media icon, which is obviously not currently available (I know I know... wordpress). While sloppy, could it be possible for me to edit (photoshop) the device-social-profile.png & social-profile.png to swap out one of the other icons not currently being used? Second question: Is there a way to add a border to the search box in the header since I changed my header background to white? www.signature-planning.com