There is the PT boat, which could be elongated, though that'd be a bit of a "stretch" (sorry, really bad pun):
and there is also a PC 451 Class sub chaser from the AOTD_MadMax shipyard in SH4 (FotRSU) that could be brought in and / or edited for the 497 class...
https://en.wikipedia.org/wiki/PC-461...bmarine_chaser
... or add nodes and controls to the sketchfab model Anvar1061 linked to, and edit the bridge, mast & weapons parts for early, mid and late war versions.