got an ol rig? Use it as a daily?
One trick is to have a huge compendium of prts sources.
They range from * 'the typical vendors' for ur Make'n Model (often inc Year specific where it matters).
Then
* go onto big box stores (Advance, NAPA my fav, & AutoZ)
* same as on-line only (Roc.A, RAU, etc)
* national used parts
* and all the on-line clubs (us).
We MUST develop this source list or sit curb side (at some point, can B wks'n months too).