We've been in your situation and its a nightmare. I would also consider buying those ones on eBay while you mull over what to do.
It is worth contacting reclamation yards. Some do email and you could send a photo. If they say they don't have them, ask for recommendations as to who to ask because yards specialise in different things. Also ask whether they've ever seen them come through.
I personally wouldn't match with new replicas. We've done that and it doesn't look quite right.