Well, I looked at the Grennell book last night. He has a couple of pictures of the "Linda," as well as one of the diminutive "Diane." No photos of the other Wilkinson pistol, the "Terry," though (Apparently Ray Wilkinson named guns after everyone in his immediate family
except himself, which is why we still don't have the "Ray" gun.
).
Grennell says the Linda was a tack-driver, and utterly reliable. I suspect you could find mags for it, but it might take you a year of looking.