Just have to be patient and keep looking. Mags have been bought up since the 2nd amend buzz started.
1 left from this guy at time of posting.
Taurus 738 TCP Magazine 380 ACP 6RD Model 510738 UPC 725327608479 | eBay
TAURUS Model PT-738 Magazine [TAG510738] - $23.99 : Bear On A Rock, Gear for the Sportsman
Just do a web search for 738 magazine. Many are out of stock but several are there.. Prices from 29 bucks to 40 bucks.
A search on ebay kicked back 4 sellers.