Well answering my own question, I also emailed Richard at the same time as I posted above to which he has already replied.
Here's an extract from it:-- However, I have some good news. A friend, who is designing some etches for his own use, has recreated the Lincs artwork with (what I hope are) some small improvements. I was discussing the artwork with him today and suggesting some changes, which he has already made. We hope to do a small test-etch linked to his own artwork in the very near future, for trial assembly. If this is successful, then we will move to a full-sheet etch, and Lincs will be back in business!! (If the test-etch is successful, it may be possible to do a small pre-production run from the original combined artwork). Meanwhile, I am starting to revise the instruction sheet in the light of my own experiences with assembling the couplers - the previous version is a bit too basic for my liking.
I trust this is good news for you and hope that you can hang on a little longer for the production kits.
Best regards
Richard
Regards