I have used paintman (
LINK) and Paddocks (
LINK) for paint, but mine is just standard Masai red so is not a difficult colour to get hold of an match.
If you are talking about the dents of the drivers wing I personally wouldn't bother. They are not that bad and these days even second hand wings are very expensive. Also the back wing I assume you are referring to the tub side? if that is the case that is a very difficult panel to replace, you cannot just unbolt and bolt back on without replacing the whole tub, so again unless it is really awful would just straighten as best as you can and leave it. Land rovers are one of the few vehicles where a couple of dents are in keeping with the "design" and just add "character". In the rebuilds of my 110, and my series I have never bothered doing anything with the dents, I just clean and repaint over them. As soon as you fix them on one panel you will just start to notice them on the other panels!