Correct, lol. Looks like it's back to the drawing sculpting board... so time yet again for me to go all Adrian Monk and overanalyze this thing.
From what I can tell, it's not just a button but is part of a larger piece as seen in pic 3 below. The silver color kinda' gives that away. Could it be a clip?
Plus, it looks to be longer than my present one (pic 4).
So, what I am going to do is enlarge it as seen in pics 1 and 5. Since the folding stock is 15 mm wide it will stick over the top a bit... but I'm OK with that.
The button part will be thicker of course, but since it will have a larger surface area on the back for adhesive it will keep it from being knocked off easily.
1 2 3
4 5
If anyone has any suggestions please let me know!