There is a T-class submarine (AI) in GWX 2.0, and I've tried to make it suitable for SH4 but so far no success at all
The T-class could be used for both RN and RNethN- two Ts were transferred to the RNethN; one, Hr.Ms. "Zwaardvisch", sank U-168 off Rembang in October 1944, but the second, Hr.Ms. "Tijgerhaai", was commissioned too late to see any action in WW2. Other Dutch subs would require separate modelling.