The All Saints are actually pretty difficult to get a hold of today. My advice is to keep an eagle eye on ebay and occasionaly pop in on dw_cosplay or the costume section on Gallifreybase and offer a fair amount for a pair and see if one of the members there may part with thiers.
Other Alternate boots that seem like best bets (aside fomr the Humpherys mentioned above) are listed here:
http://eleventhdoctorcostume.blogspot.com/2010/04/all-saints-boots-alternatives.html
The new series 6 boots are rumored to be russell and bromley boots (or based on them) but this has yet to be confirmed. Best match readily found are the Vintage Look Boots by TopMan.
Other Alternate boots that seem like best bets (aside fomr the Humpherys mentioned above) are listed here:
http://eleventhdoctorcostume.blogspot.com/2010/04/all-saints-boots-alternatives.html
The new series 6 boots are rumored to be russell and bromley boots (or based on them) but this has yet to be confirmed. Best match readily found are the Vintage Look Boots by TopMan.