348winchester: I finally worked up the energy and motivation to turn off the alarm to my gun vault room, open the steel door and work the combination to one of my gunsafes and dig out my mint/unfired Winchester 94/22 Magnum and inspect the cartridge follower tube!
I was to lazy to set the magazine up for a picture which I can not post on here anyway!
But I did ascertain this - the green follower is EXACTLY like my 94/22 Magnums both in shape and in shade of color.
If you could measure "exactly" the length of your tube I could compare that tomorrow (dinner bell just rang here).
I would say that (with 95% certainty) your "inner magazine" is the same as my Winchester XTR 94/22 Magnums inner magazine.
Hope this helps.
Hold into the wind
VarmintGuy