autozone

their process goes, local sister store, then hubs (all nationwide) if one or more have it. it gets pulled from the hub least likely of moving the part otherwise. lastly it comes from vendor direct, in this case probably rare parts. absolute last option is an outside buy, but it is so hard to do with all the complicated LP crap attached to it. Most don't want to make the effort of doing it incorrectly and failing an audit because of it.