2016 FORD E-350 Seats Problems

VEHICLE IS UPFIITTED BY MORGAN OLSON WITH SEATS BY FREEDMAN SEATING. THE PIN THAT HOLDS THE SEAT PEDESTAL TO THE SEAT BASE FALLS OUT AND THE SEAT FALLS TO ITS LOWEST POSITION WITHOUT WARNING. THIS HAS HAPPENED TO SEVERAL OF OUR FLEET TRUCKS. THE DETENT BALL SPRING IS TO WEAK. WE HAVE MODIFIED 2 OF OUR VEHICLES BY DRILLING OUT THE BALL AND INSTALLING HAIRPIN CLIPS. ON THE OTHERS WE HAVE INSTALLED A ZIP-STRIP THROUGH THE PIN RING WHILE WAITING FOR INSTRUCTION FROM MORGAN OLSON CONCERNING A AUTHORIZED REPAIR. HAVE MADE SEVERAL ATTEMPTS TO OBTAIN FEEDBACK OVER THE COURSE TO 2 YEARS, BUT HAVE NOT RECEIVED ANY INSTRUCTION AS TO HOW THIS ISSUE IS BEING HANDLED. THE SEAT FELL WHILE THE VEHICLES WERE IN MOTION IN EVERY INCIDENT, STARTLING THE DRIVER.