Seems Forge Motorsports has parts already for the Mk 7 GTi.. I bet most of them available will bolt on the Mk 7 R... Hoses and inter cooler upgrades look interesting...
http://www.forgemotorsport.com/content.asp?inc=product&catalog=260317&cat=260317
http://www.forgemotorsport.com/content.asp?inc=product&catalog=260317&cat=260317