I just compared the sizes and they are almost identical, bar a milimeter here and there
Kindle
Height 190.5 mm - 7.5"
Width 121.92 mm - 4.8"
Depth 8.5 mm - 0.335"
Orizon
Height 189.8 mm - 7.5"
Width 125.7 mm - 4.9"
Depth 7.6 mm - 0.29"
Height difference = 0,7 mm Kindle being bigger (or not if Orizon site is correct)
Width difference = 3,8 mm Orizon being wider
Depth difference = 0,9 mm Kindle being thicker
The conversion to mm from inches regarding Kindle I did myself with some application so it may be not absolutely perfect (that's why it's 190.5 mm for Kindle even though Orizon site says less) I hope I got the math right
The inches measurements of Kindle and the comparison of Orizon between inches and mm are copied from their respective sites.
Perhaps Orizon would fit? Fun fact, I neither have Orizon nor Kindle but those covers are so beautiful *sigh* I thought this could be worth considering if anyone was interested?
Apologies if this is old or inaccurate news, I don't seem to be too lucky in this department at MR.