A little OT but, here in my town, the place to go for anything homebrew electronics was
Gateway Electronics. If you want some obscure part, or just an every day transistor resistor combination, Gateway probably had two or more. I just learned that they are closing at the end of this month after 60 years in the business. I can't tell you how long ago I first went there.
It's a dark, dark day. I don't know what I'm going to do. I often built stage props for the theatre companies I worked with using parts from there. If I ever hit a snag, the guy behind the counter could help. I once needed a telephone to PA system interface and couldn't remember part of the telephone side. The guy behind the counter grabbed the parts, put it together, tested it, and drew a schematic for me that worked the first time.