I'm not sure if there's any specialists in this sort of thing (especially in this 'chuck it out rather than repair it' disposable age), but probably your best bet for leather work would be a saddlery?
I used to know a saddler, and while his mainstay was saddles and horsey stuff, he used to turn his hand to all sorts of stuff - if it involved leather, he'd have a go.
Might be worth a try - the worst you'll get is a funny look!
Garry
1976 2.0 (soon to be 3.5!)FHC
http://reds-tr7.blogspot.com/