That is definitely NOT the correct magazine. You want .380 Auto (or .380 ACP), the .38 Auto is a different round entirely, and the gun is quite a bit larger I believe.
I don't see any on Gunbroker at the moment, but this page at Triple K appears to be the correct magazine -
http://www.triplek.com/Products/id/38/grp/412/prd/608/
I could use a second mag for mine, I might order one myself.