Hacking Looking for Japanese DS shells

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Hi there.
I bought this completely matte Honeyee shell recently for $14, but I know for a fact that the back is a North American back. This irks me a bit, having a NA shell on a Japanese-only case.
I know Japanese matte backs exist outside of the rare Honeyee shells (ex: Here), but I can't find a Japanese Crimson/Black or Cobalt/Black shell online.
Could anybody help me on this endeavour?

 

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Nevermind; this can be closed.
I ended up buying the broken DS I mentioned in the second link. I'm going to take the parts from the case, fix it up with a new one, and sell it.