Welcome from Texas! I bought most of my mags from MidwayUSA. They have excellent prices on mags and their shipping charges are very reasonable. As Texas will allow open carry in 3 more months, I do not see the needs of the shorty mags for my compacts anymore (would be nice to have them, though). I'm not going to openly carry my EDC but I will not have to worry much about printing then.
I believe you said Taurus CSR was talking about the shorty 10rd mag.