Are there any stroker kits (don't want the 2.5) to push upto 2.6 or greater?

 

You would have better luck at a Mazda forum like people with 2.3l Limas went over to Mustang forums when look for high performance upgrades

I think Mazda 3 and 6 used the 2.3l L3-VE

The 2.5l L5-VE was a bored and stroked 2.3l so crank and rods would work, maybe larger pistons would get you to 2.6l