The distance, I don't mind. I've only been to Austria once. Vienna for a day on our way to Slovakia. Both beautiful countries. I could happily live in that part of Europe (but they won't let me).
I guess I should take a look at some parts diagrams and make a list of all the bits we would need to swap.
The fees will be what they are. I expect it'd still be cheaper than buying the parts.
However, I may be able to source parts for myself locally and depending on cost, would have to weigh up which is the best way to go.
The other problem with swapping is the time it takes for shipping parts during which we can't ride our bikes.
I'll get back to you soon.