Stop in for a cup of coffee

How hard would it be to find a pair of SBP "slotted mags"

I bought a car with a pair on it so if i can find another pair to make a set .....i might use them which would be the first time ever that i have thought of using non O.E. parts :realcrazy:

They are out there. They pop up on ebay and craigslist from time to time.