Find a Panorama 6 file which has no filename extension.
The application Find Any File can do this.
You’ll need to use their expert mode to search by type code or creator code. I think the type code for Panorama 6 files is ZEPD and the creator code is KASX, but it might be the reverse. Ok, I looked it up in some old code and I’m pretty sure the type code is ZEPD.
Find Any File is not free, but it’s only $6 on their web site and $8 on the Mac App Store.