The only way, until a Type IX mod is completed, is to use the Sort of .IX Boat mod v1a. That will give you the extra range and torpedos of the Type IX.
Found here....
http://www.subsim.com/radioroom/down...o=file&id=3452 There are others for 43 and 44 but I prefer this one.
I use it with the VC41 - Start with in beginning of campaign mod.
Found here.....
http://www.subsim.com/radioroom/show...f+campaign+mod
I use this skin with without any emblem... first one listed and downloaded from MediaFire.
Found here.....
http://www.subsim.com/radioroom/show...f+campaign+mod
Tho not correct for the early war years, it's so much better using these mods together.