I go back and forth between parts stores these days. CarQuest, without fail, has weird/obscure pieces for my older stuff. A lot of the time they've even had parts in stock for stuff built in the 60's. Very surprising.

I used to buy from O'Reilly exclusively but their MasterPro line of parts has gone WAAAAAAAY downhill in terms of quality, even to the point of being dangerous (think about polyurethane suspension bushings that explode when you torque the fasteners to spec.) I get most of what I need from AutoZone now, much better quality control, and I can sometimes get them to price match Rock Auto.