Tire Sidewall problems of the 2005 Ford E-450

I recently had three (3) bf goodrich tires (225/75r16e bfg comml) on my RV separate within 1,000 miles of each other. These tires were less than 3 years old - 2 failed with less than 10,000 miles and 1 failed within 11,000 miles of purchase. At the time of the separations we were in rural southern oregon about 1,000 miles from our home in southern California. The first incident occurred in may 2013 when 2 rear tires had separation at the sidewall and tread. At the time of the second incident in July 2013 another tire started separating at the tread. We replaced all 3 tires in oregon at the local tire dealer. At the time of the first separation, I contacted the dealer where I purchased the bf goodrich tires requesting his assistance in submitting a warranty claim. He told me there was nothing he could do until I returned home. I took pictures of all the separated tires inclusive of separation areas and dot numbers. Upon returning home, the dealer said he needed the old tires for warranty claims. It is ridiculous to expect us to carry 3 damaged tires around in our RV until we returned home. This is especially unreasonable when he told me at the time of the first incident that there was nothing I could do at that time - that was when I could have made arrangements to ship the tires somewhere for inspection. I contacted the tire dealer's corporate customer service representative who made many calls to his supplier and bf goodrich. He could get no help for this issue without the old tires and actually was told by a bfg rep that "bfg did not make tires that failed". Needless to say I was astonished to hear such an outrageous claim since 50% of the bfg tires I purchased in March 2011 failed due to separation with less than 12,000 miles and within 28 months of purchase.