I have just been brainstorming for piston ideas and came up with this, not sure if it would work but it might be worth looking into.
Wiseco list the 3TC (+160 thou) Pistons with a 10.2-10.9 CR.
Bore size: 3.504" / 89.00mm
Comp Height: 1.375" / 34.92mm
CR: 10.2-10.9 @ 63cc (0.040" / 1mm Gasket)...