Have three XD40 mags which work as XD9 high capacity mags.
These mags even have the "lip adjustment" which makes them fit 15 rnds. of 9mm.(you gotta have a strong thumb for the 15th. round, but it works-I use a Glock mag loader and it's easy to get all 15 in)
$22 ea. shipped. LOWERED TO $20 shipped! ea. mag
Kimber Ultra .45 mag, NEW never used $15 shipped.