In general, I have used Wolff Extra Power Magazine Springs.
Wolff does not currently have magazine springs listed for any of the Polymer framed Taurus Pistols. I would call Wolff directly for a suggested Spring or try the Magazine Springs listed for the Tanfoglio Compact Pistols, as those tend to be generic fit springs.
In selecting an extra power spring for your pistol, stick with the +5% strength, as you will find the +10% springs waaaaaaaay too stiff. I got some +10% extra power magazine springs for my PT92 and it took about 3 years of use for those rascals just to wear in!