Have three 1911 mags I'm just not using.
Two of them are Springfield Armory (blued), the other is a stainless Kimber mag.
I added slam pads to the two Springfields when I got them, they are screwed on/removable.
See picture below.
I've fired both the Springfield mags once or twice, worked perfectly. Never did anything with the Kimber mag, it came to me in a trade.
All three of them for $25 shipped!
Prefer Paypal, but Money Order is OK.