It MAY be tricky to get one in the first place... (as a standalone)
that aside.. This was the best teardown of a non DXg I could find
http://www.rapidrepair.com/Merchant2...n=cp-kindle-dx
and more specifically the wireless card
http://www.rapidrepair.com/guides/ki...-exposed-1.jpg
I don't see why your plan WOULDN'T work, but don't take that as a cast-iron yes as not only have I never done it - I have never head of it being done... that said..
if you find yourself short of a module... you should find them in here
https://bitbucket.org/twobob/kual-system
and I DO recall a
bluetooth card being rammed into one and that eventually working.
(tiny few
extra notes here)
also... The difference between the wifi and 3g k3's is certainly not OS based - as they share the same one.
So... YES, with caveats.
Oh... and I would get myself serial-level access before trying anything so outré-monde