I build wheels a couple of times a year. Built a set of 650B couple of years ago because it was hard to get what I wanted otherwise. I recently built a rear up, because I wanted to save a 27" rim and wanted to use a Campy high flange hub. The old freewheel (five speed two notch Suntour) decided it wasn't coming off the Tipo hub, which is pretty used anyway. I have a great resource in Ft Collins, Brave New Wheel. Sat morning called in, two hours later I went by and picked up my spokes. Social distancing of course, curb side pickup. But, I have been doing my own stuff for years and have everything I need. Having been an auto mech for most of my life makes it easier. However, when I wanted a set of Mavic Kyseriums, went to Ebay for those.