Welcome to the VCCA!

I think you are on a reasonable track.
Original stock is a great end point.
But in the mean time, if you have to fudge a few things as you said, that's great too, if it gets you going and having fun driving your car.
You can always keep your eyes open for the original stuff at reasonable prices along the way and upgrade if you like when you find it.

That's what I've been doing with my truck.
Some things obviously got changed here and there through the years, and some things just needed to be repaired/readjusted/replaced.
As I find original stuff, and get around to stuff, the truck gets closer to factory original... one little thing at a time.

Have fun!