I was wondering how common the old Parker Hale M81 in.404 Jeffrey was?

Has anyone seen these in their travels?

I had use of one for a while. It was I think an FN action (I read somewhere about a Santa Barbera action?). A plain stocked rifle. Most I saw were in .375 H&H.

Now seeing I have a .450 No2 NE in a WJ Jeffrey I was thinking a future .404 Jeffrey would be nice. In a Parker Hale or a CZ. Then maybe a .333 Jeffrey but I know nothing about this calibre and need to read up. Future project ideas only at this stage, but I have wanted to replace the .404 ever since I let it go.

PS My middle name is Jeffrey too.