This ebay seller sells all RW stuff, just tell him what size spurs you want.
All transactions I have had with him have went smoothly, and quickly:
rc*hop*up5
http://search.ebay.co.uk/_W0QQsassZrc*hop*up5QQhtZ-1
http://cgi.ebay.co.uk/2-SPURS-TO-FIT...QQcmdZViewItem
I know this won't get you it for Sunday, but incase you have trouble getting them, its a good source.