The following fleetboat kits are currently available:
1/72 scale USS Gato (SS-212) by Revell

1/144 scale USS Gato (SS-212) by Trumpeter

1/180 scale USS Lionfish (SS-298) by Revell

The following books are recommended for detailing fleetboat models:
US Subs in Action
by Robert C. Stern
1983 Squadron/Signal Publications
Fleet Submarines in WWII
by Thomas F. Walkowiak
1988 The Floating Drydock
The Floating Drydock's Plan Book
Gato & Balao Class Submarines
by Thomas F. Walkowiak
1990 The Floating Drydock