Hello. To my knowledge you cannot get them because no one will sell them! I recently tried to buy followers only for a .40 HP from both Browning and the folks who actually make the magazines, Mec-Gar. No one would sell just the follower, only complete magazines.
Best.
B Shipley I tried emailing you but it returned undeliverable.
I too am looking for baseplates, I received a message from Gun Parts Corp, aka Numrich, that they have the part at $3-4/apiece. Will look into it further and post here.