Now that you mention it, I'm having a hard time coming up with more than a couple of hammered polys in any configuration... CZ P07 and a few others here and there.
Hammers seem to be mostly in metal frames
If your getting along with the grip size of the PT1911 you should also be able to manage a Walther PPQ? No?
Perhaps your just not getting ahold of any double stacks that actually fit you and feel right?