You might want to look into the kso trek model It has a leather top and the thicker trek bottom, But I think they discontinued that model. The insoles could be replaced But they are only on this model. The injinji socks work very well. For hot surfaces they do fine. The trek model would probably be best for you. Keep in mind they are pretty ugly.
http://www.vibramfivefingers.com/products/Five-Fingers-TrekSport-Mens.htm
