I bought a N/A water pump thinking I could add a collar to the third port area and save some cash. Like you said, they look the same. After draining the coolant, removing belts, pulleys, etc, I saw the Valeo alternator mount area is very different.

This pic looks SRT6

Product Detail

This pic looks N/A although LISTED UNDER SRT6.

More Information for PRONTO 54472250

Looks like Rockauto.com has the correct water pump for the SRT6 for $168 US.