Funny you mention that. Many years ago, the late Lynden Emery started a narrow-gauge group within the Scalefour Society, applying P4 standards. It seemed to be going well until he died, after which development work tailed off.
If he replies, please could you let him know there's a second set of etches that will find a ready buyer here? I'm not on RMWeb.
Thanks in anticipation.
1000+ isn't small, when you remember that Bachmann batches are 502/504 at a time.
A small batch would be more like 250 plus spares (if such support is being made available).