Just saying is all.
I get customers that want stock, cheap, simple, fast turnaround, and want a new valve put in, only to come back weeks or months later for the delete when their cooler cracks and gives them a real headache. And the shiny new-ish valve is sitting there unused from then on.
I don't know how to answer your original question. For us, it's always "need it now" and we get from Advance cuz they will deliver.
Otherwise, did you check eBay? I swear you can find anything cheapest on eBay or Amazon.