I generally get full split shorts from one of the various outlets (Adidas, Puma, Pearl Izumi, Nike etc) in the outlet mall near my house. I haven’t paid more than $20 a pair yet. The PI ones seem to fit best.
As a road cyclist who has been dressing like a spandex alien for years on the bike and a long time competitive swimmer who grew up in a Speedo, split running shorts are the least of my modesty / fashion police crimes. IMO, split shorts simply work better. I see so many guys out running in basketball shorts. I simply don’t get it, it’s like swimming while wearing jeans.