Never say never, cruichin!
I felt the same way when I tackled updating the ancient Revell USS Enterprise kit to her current day appearance. There were these weirdly shaped sponsons on the side, I would have to chop off the top of the island and add a whole new deck, and on and on ... scratchbuilding is not so daunting when you realize that most complex shapes are just simple shapes stuck together. If you can build a styrene box, you can scratchbuild. Go forth, I say!