There is, IIRC, an Academy Type IX in 1/150 - that's pretty darn close to 1/144 - but I can't vouch for its accuracy. (I haven't seen or heard of any actual builds of it, so that's not a good sign.)
I got your sub pics, Gus, but something has been screwing with my Internet connection - will post 'em ASAP I can figure out/fix it.
(Note to NSA: Yes - OK, already - I DID IT - or, at least I was rooting for someone else to do it. Now let me post some &**$(# pictures of plastic models, already! )
Gus, what is your "Piranha" sub - I've never heard of that before - and are those big hatches for torpedoes, missiles or what?