Are there any independent kitchen manufacturers near to you. They might have some in stock and sell you a, pair if you ask nicely.
God knows. There's an Howdens nearby who should stock them I'd have thought so I might try there. Failing that they're getting the first door fitted back on and I'll order one of those for the second door later
Just take one off, they might have the makers name on, I did it and they were so sorry their hinges had failed they sent me a new pair FOC.