2012 Keystone Laredo

I BOUGHT THIS KEYSTONE LAREDO 295RK IN 2012. THE CAMPER CAME WITH POWER KING TOWMAX STR ST235/80R/16E TIRES. THEN IN OCT 2015 THE RIGHT REAR SEPARATED INTERNALLY, BUT DID NOT GO FLAT, DATE CODE 4910 CALLED MANUFACTURER AND THEY ADJUSTED TIRE. THEN IN OCT. 2016 ANOTHER TIRE SEPARATED RIGHT FRONT POWER KING TOWMAX STR ST235/80R/16E DATE CODE 4910 CAUSING DAMAGE TO CAMPER, CALLED WRECKER AND HAD SPARE INSTALLED. AT THE TIME THE TIRE BLEW I WAS DRIVING ON 2 LANE STATE HIGHWAY WITH SPEED LIMIT OF 45. GOT TO CAMP GROUND 1/4 MILE AWAY AN INSPECTED OTHER TIRES AND THE FOUND THAT THE LEFT FRONT HAD AND INTERNAL SEPARATION, BUT STILL HOLDING AIR, POWER KING TOWMAX STR ST235/80R/16E DATE CODE 4910. I STILL HAVE THE TIRE THAT BLEW ON THE RIGHT FRONT AND THE INTERNAL SEPARATION ON THE LEFT FRONT. THE OTHER 2 TIRES OUT OF THE 5 ORIGINAL TIRES HAVE THE SAME DATE CODE 4910. THE MARKINGS ON THE TIRE ARE DOT 83B5 GPB 4910. CONTACTED MANUFACTURER AND THEY WILL GIVE ME A CREDIT FOR 3 TIRES AND WILL PICKUP 3 TIRES, AFTER I HAVE TIRES REPLACED AND THEY INSPECT TO SEE IF IT IS THE FAULT OF THE TIRE. THEY ALSO HAVE OPENED A DAMAGE CLAIM. MY PROBLEM, THESE TIRES ARE NOT READILY AVAILABLE IN MY AREA, HAD TO BUY A HERCULES TIRE TO REPLACE THE LEFT FRONT. I WOULD LIKE TO SEE IF YOU CAN CHECK THESE TIRES AND MAKE THE DETERMINATION SINCE I FEEL THE MANUFACTURER WILL NOT BE TOTALLY HONEST ABOUT THE RESULTS.