Belly dump air valves on the gates

on buddy barry's belly dump, the air gates are slow and giving us problems. on the weekend i replaced the ecectric solinode and cleaned the air valve and line thinking there was blockage. when i had the air velve apart, i thought the passages were a little small. is there a place on the intenet where and i can get a valve with bigger passages to match the bigger cylinders??? thansk KoO Published Author