Does it really matter whether the model is a replica of a "real" ship. You are doing a great job and the model will stand alone as a testament to your modelling skills. I think many people get too hung up on whether a particular kit is an accurate representation of an actual ship in history. For instance, I have a kit of the USS Lexington, which the experts agree is totally inaccurate. I like the looks of the model and will strive to make it as realistic as I can, regardless of the name they decided to give the kit. The important thing is that you enjoy creating a smart looking model that you are proud of. 99 people out of 100 won't know and don't care whether it is an accurate representation of a real ship.