Hi Vrony,
You could try Alternative Footwear, just google for them. You will need to add a size or two to your normal male shoe size as others have said. Alternative Footwear have a sale on at the moment and some styles go up to size 14!
If you can't face going into shops and trying stuff on that's very understandable, I couldn't either.
As well, if you feel that having stuff delivered to your home is too risky, the Post Office has a Poste Restante service. You just set the delivery address of the order as your name, then Poste Restante, and then the address of your local post office. The goods will be delivered to the Post Office of your choice and you go down there and pick them up. Just search
royalmail.com for poste restante if you want full details.
Another online store selling lovely stuff including shoes is
StockingsHQ.comGood luck,
A.S