Here we go:
Nichimo:
1/200 IJN I-19 @$45 retail Plastic
Aoshima:
1/700 IJN I-1 and I-61 box set @$9.00 retail plastic
1/700 IJN I-400 @$9.00 retail plastic
Fijumi/Seaway:
1/700 I-15 and I-46 box set @$8.00 retail plastic
Tamiya:
1/700 I-16 I-58 box set @$8.50 retail plastic
Hasegawa:
1/700 I-370 I -68 box set @$8.50 retail plastic
1/700 I-361 I-171 box set @$8.50 retail plastic
Skywave:
1/700 I-9 and Ro-35 box set @$18.00 retail plastic
1/700 I-13 and I-14 box set @$19.00 retail plastic
1/700 I-400 and I-401 box set @$22.00 retail plastic
Resin:
Seawolf/Torpedo/Combat-Sub (Specialist submarine kits manufacturer)
(Kits combo plastic/resin/white metal)
All kits 1/350
IJN I-1 @$57.00 retail resin/white metal
IJN I-15 @$54.00 retail resin/white metal
IJN I-13 @$79.00 retail resin/white metal
IJN I-400 @$85.00 retail resin/white metal
Waveline:
1/700 IJN Ha-101 Ha-201 resin coastal submarines (WW2)
THat should get you started.