When in the US some time back I came across a Puma outlet store (think end of line discount) selling the BMW Motorsport shoes very cheaply.
https://eu.puma.com/uk/en/pd/bmw-motorsport-future-cat-trainers/4057827692327.html They are very nice, not in the Piloti grade but flexible with support and quite well cut. In the blue colour they are quite subtle, just what you need driving an Aero Coupe with Sidepipes, subtlety. I think I paid about $60.
