You can try these guys in Korea (http://jnkanalog.cafe24.com/main.htm). They do have skins for the Olympus EP and EP-L series and they do custom leather work, just ask them if they would do a set of leatherette for the X1. They have a very nice selection of leather.
I have ordered a case for my Zeiss Ikon ZI and should have it in the coming few days.