I had a similar experience at the parts counter at the Ford dealership when I wanted washers for the differential of the 9 inch center section when I was building my '32. "What year?" "1959 Ford," I said. "Our computer doesn't go back that far." "Okay, how about a Bronco?" "Need a part number," he said. "You can't look it up by year?" "Need a part number," he said. I mumbled some expletives and walked out, called Randy's Ring and Pinion where I got the differential and asked if they could send me some. "Why don't you just go to your Ford dealer?" the guy asked. I explained. "What idiots," he replied.