Here you can get a registration code for Icon Studio software.
Summary: Tab activation and auto-scaling are added to the extensibility model of the ribbon in the Microsoft Office 2010 Fluent user interface.
Ribbon & Wizard License – Actipro Software
Ribbon Bar Icons for Windows 7 – 758 high-quality ribbon bar
Ribbons (Windows) – msdn.Microsoft.Com
Free vector icons in SVG, PSD, PNG, EPS and ICON FONT