OH, why not? I don't mind branding myself and contributing to charity and since I'm going to the Giro and Tour next year, I may as well advertise my allegiance. At least it'll stop everyone assuming I support TeamSky because I'm English! 
If it suits, I'll donate to Cerebra, a charity for brain injured children here in the UK, which I've supported for years now. Seems fitting, in the circs. 
http://www.cerebra.org.uk/English/Pages/home.aspx
Not sure what small means, but if not my size 10 frame, then my young niece will quite happily wear it every day, since she's a little Contador fan also (isn't brain washing wonderful?!) PM with what you deem reasonable donation. 
Won't be in a auction, tho. And I hope it isn't frightful - like please tell me it doesn't have his face all over it because that I really would never wear (maybe as pyjamas ? ;o) )!