I contacted 'Alden' recently via email - Made a post or two about it - I emailed 'Alden' about re sizing - Alden's reply was, "Sorry we no longer offer this service"! And I asked about bespoke and again it was again a no. Hopefully you have better luck with them.
Otherwise try professional shoe stretch route. I've heard some say its great for attaining a half size! No more than that really!
How viable is shoe stretching? Does it affect the look of the boot/shoe?