Digikey is my new best friend.
Digikey is the sixth largest electronics component supplier.  Think Radio Shack, but bigger, much bigger. I have their catalog on my shelf. Phonebook quality paper, a good inch and half to two inches thick.
I ordered three infrared receivers (PNA4601M, in case anyone was wondering) for this project I have on Friday afternoon last week. Using the least expensive shipping option, they arrived today! That’s sweet!