I came across a new cork floor that is soon to be released - Hydrocork from Wicander (a high end cork company). It claims to be, amongst other things, water resistant and very stable. I believe it has a vinyl face that comes in 12 "realistic textured wood visuals" Here their description:
"Hydrocork is the ultimate amazing step in flooring offering a low thickness floating solution with all the benefits of floors with Corktech. The Corktech technology enabled the creation of an innovative core board made of composite cork. It is water resistant and incredibly stable, while mantianing the resilent properties and unmatched comfort brought by cork."
I am definitely curious to find out more once it is for sale.
Here their website: Hydrocork The first Corktech low thickness floating floor, by Wicanders
and Youtube video: