Missing window lock key - easy to replace?

[thumbinthemiddle]

Moved into a new house and realised all identical windows are missing keys. Is it possible to identify the make from the picture?

View media item 70461
Is it hard to exchange, ie do I need a locksmith or can I do it myself?

Stupidly enough, we had a locksmith changing the front door lock but with so much on our minds we completely forgot about the window key...

Thanks for any help!
tim

 

[footprints]

Have a look here very good company I have used them a couple of times.

http://www.handlesandhinges.co.uk/window-handle-keys/

 

[thumbinthemiddle]

Thanks, will have a look.
tim