I've posted some photos of the problem below. Any help is greatly appreciated.
I need to extend the axle on the hub of this wheel so that it can sit on 135mm stays. The wheel originally sat on 75mm non-standard stays.
I have a longer axle and thought that replacing the existing axle should be straightforward (I have only seen youtube videos of how this might be done) I opened up the hub to the extent you see in the images, but can't proceed from there. My LBS has now told me that the hub is sealed and the axle cannot be removed. But I'd still like confirmation of this.
If the hub cannot be disassembled I wonder if there is anything I can use to extend the axle. Like an axle extender used for kids' training wheels: http://www.especialneeds.com/axle-extender.html
Or are there any stay attachments out there I can use to reach the axle on the wheel?
Or is the only way forward to remove the hub completely and rebuild with a new hub?