I am currently in a dispute with guitarpartsresource.com. I received a set of 4 string ferrules, but they don't match my US Fender Jazz 2008. Fender told me I need part 004 8604 049. I put this to guitarpartsresource.com and sent them photographs of the ferrules I received against my current ones, but they say they are the same. They are saying they sent me 004 8604 000 and that this is the same as the 004 8604 049. They adamant they have sent me the correct ferrules and are refusing to send me anymore out. Any parts experts out there agree about the parts numbers being the same? Very confusing!