A flat and maroon ginger

This palm-sized peacock ginger originated from Thailand - I have no idea what it could be. A website listed this as Kaempferia purpurata but I do not think it is a valid name. K. purpurea perhaps ?

Like most Kaempferias, it is seasonal and the 2 large palm-size leaves appear only for a few months of the year, during which the single white flower will protrude between them. The flower lasts only 1 day but will be replaced by new ones while in season. The bloom reminds me of K. rotunda but the leaves are totally different.

Please drop me a line if you have any idea what is the ID ; alternatively any literature of Kaempferia purpurea should help also.