what is the largest big bore blaster piston size you can buy

I belive the 265 kit from trinity was 76mm and i have no idea about the 285 kit, a wild guess would be something like 80mm. cp customs makes one but i forget which, i think its the 285.
 
you could always look into pistons from other 2-strokes that will swap. Cross the dimensions IE. wrist pin hight,wrist pin diameter,bore, skirt hight,window sizes,and go from there,i know there is stuff out there that will swap.