If it's of any help to you several retailers sell shoes in odd sizes. Clarks is one of them.
//Odd Shoe Scheme
If you or your children have different sized feet, here at Clarks we can supply most of our shoes in odd sized pairs.
Instead of having to buy two pairs, you can have one pair to fit both feet. There's a surcharge for this service, 25% for children and 50% for adults on top of the usual shoe price.
It is recommended that both shoes should be tried on for suitability and advice taken from the staff before purchasing.
For further information please contact your local store or customer care on 01458 899901.//
http://www.clarks.co.uk/helpandinfo/storesinstoreservices