I've always liked Tom's takes on things, and recently come across a nice diesel he made. As far as your Hudson's headlight, I think fabricating one will be the best way to go about it. Looking at the photos you have, the drive roads don't look bad at all, but if you want to clean them up some more, I'd suggest using a good automotive chrome/metal polish. I have used a product called Wenol, made in Germany, and not readily available here in the US, but maybe so in the UK, but any good metal polish will do. Here's the results on a K5 I repainted years ago as a fugitive from a junk box. Sorry about the poor photo quality, but back then, I wasn't so interested in documenting the process so well:
Before:
After:
I painted it a prototypical color, installed an LED headlight, can motor and a solid state reverse board. Runs great!
