Sorry to read of your problem! Last Sunday I too broke a half shaft, and my Lambda is now in Val d'Aosta waiting for the truck to take it back to Switzerland.
I do not know on which side of the Petit St Bernard you are: French or Italian (Val d'Aosta)?
I would not use a used gear with fibre, but almost no bronze. Fibre would wear away very quickly!
Some possibilities:
- Nick Benwell certainly has some used (well used?) parts in his parts stash at The Phoenix
- I assume Tony S. also has some
- I think I have a good used set in Switzerland
But it depends on your aim:
- Do you want the parts to repair on site (I assume Aosta)
- Or will you have the Lambda shipped home by a recovery service (AA or similar), and do the repair then, in your garage?
If you want to repair and drive back, then you could also contact Guido Gotta in Bra. He most certainly has used or new gears, and best would be to go and see him - worth a visit! Bra is less than one hour South of Turin.
Finally, if you leave the car in Aosta, and need to get home, I recommend the bus from Aosta to Martigny (Switzerland), then the train to Geneva Airport, and a plane (normally Easyjet) to UK. The bus is at 11:15 am or 4:50 pm from Aosta.