The font is this:
It's not free but there are other ones you can download and modify:
Having the scanned CPO and some measurements, the parallel and perpendicular lines are not a main problem.
I know what you are talking about 'cause I have the same problem as you XD. I'm never happy at all with the final result I get, but I finally realize that the original artwork is unique and all I can do is trying to reproduce it the best way I can. There's only one masterpiece, the other ones are only reproductions