None that I found. What I did was get a P-09 mag and added a Springer Precision basepad, the one they sell as a 140mm mag extension, plus the grams follower and spring. Got me to 23 rnds and fits the EGW mag gauge.
Shield Arms makes a nice +5 basepad for the P10C mag, but only holds 20 rnds and is about .250? shy of the 141.25mm max length.
Advantage of the Shield Arms on the P10C mag is it is flush with the bottom of the magwell and prevents overinsertion. The P-09 mag with SP basepad sticks out some, so if you reload vigorously at slide lock (I know, I know, what are you doing reloading from slidelock in CO division...) you run the risk of bending the ejector.