I had a look on rockauto one night, the distributor rotor is common with a 88/89 ford festiva, and a 87-92 mazda b2200.
This would imply that the cap from these vehicles matches the rotor, as far as electrode point spacing/diameter. Not a sure thing, but a starting point at least
The mounting holes & offset may be different.
If you look up these caps, the plug wires attach differently. IF one of these caps were to work, AND the plug wires are insufficient length, you could likely use 1.8L ford escort plug wires as they are longer
The aforementioned caps are fairly cheap, if someone is looking to do more legwork and order the caps to see if they'll work, that'd be a good thing for the community. I have an N/A parts car that hasn't run in years, but I lack the time to get it going to do any testing with other caps
I did go so far as to 3d scan an oem N/A distributor cap, 3d printing is likely out as a reproduction method due to material constraints. But if anyone has any ideas I'm open
**I did hear that the Australian guys can get these things still, is there anyone down under who can chime in?