I think that is close enough. The O seems a bit too oval (the 1:1 seems to have more vertical sides) but on an N scale model, that will probably not even be visible. Heck, the different R I questioned earlier would have probably been ok. It all depends how anally you want to approach this project. I don't know what you use for graphic program, but I, in Corel Draw, would have found letters that looked close, converted the text to curves then tweaked the shape of the letters which needed tweaking.
