I can get brand name parts at rockauto for a half to a third less than the cost of parts stores voodoo brands.
If you go into parts store they usually have to have the old part "to match it up" with their part.
I am rebuilding a 1987 GMC pickup and every single part I have ordered has been an exact
Occasionaly some small part is not exactly the right part. But the reason is that it is Dorman or some similar "HELP" part., which is the only new part available anywhere. And still a lot less than parts stores. I haven't had anything yet that doesn't work.