I’ll offer a bit of reality to C&V. I’m not saying don’t chase after that bike, but the reality for me is I have more spare parts than I can possibly use in my lifetime.
I can’t speak for others, but even with all the backups I have, every now and then I still need hunt something down. And If I see something at a great price, that I could possibly use someday, I buy it and bin it. I cannot imagine starting from scratch today with nothing.
You need to research potential candidates and identify a short list of bikes you want. You also need to figure out where you can get certain parts. Co-ops are great, but what you find is what they got.
If it were me, I’d look for a 90’s steel bike, although aluminum might work. Getting one upgraded with newer components is fine, but personally I hate black on a classic frame. My personal preference would be a 90’s Serrota with Shimano Ultegra; maybe 7700 hubs.
John