I went to the iHobby Expo
today in Cleveland. There was not much submarine related stuff.
Pegasus Models had this little NAUTILUS model on display; about 20" long. I asked if they were considering a larger version, suitable for rc; answer was "no".
ArkModel had several subs on display. 1:72 scale DRAGON SHARK
1:72 scale Type 039 SONG Class
1:48 scale Type VIIC, due in July 2013.
1:72 scale KILO
DEEP WALKER ROV