Kain has some exotic straps in his website, I just placed an order for a Veteran Sub series yesterday. He is HK based strap maker.
http://www.kainheritage.com/strap24mm/xiranostrich
http://www.kainheritage.com/strap24mm/xiranalligator
http://www.kainheritage.com/strap24mm/xiranalligator
anyone noes who can custom make a 24mm leather strap using Prada's Saffiano leather?