Yeah, far as I can tell from their own websites & a few others. At least not for an 04-08 GP.
I wonder if my only real option is to add spacers of about 1/8" on either side of a 1.5" coil. But even that's a bit dopey if I want to stay real close to the oe rate - not swapping for any performance gains, quite the opposite - low & slow she go..

I'll buy the winner a beer!