If the engine mounts are worn, now would be the time to replace them before any cowling work was done. That's a bit of a project in itself, but it's achievable in a weekend. If they are quality mounts and in good shape, it's probably not worth the effort and cost to replace them. Especially if the pics look the same from nine years ago.
It's hard to tell from the photos, but it may be possible that the original builder didn't sand the cowling halves down far enough for the cowling outline to match the spinner diameter. You're looking at a LOT of work to do that, as the geometry of how the cowling matches the fuselage changes as the nose is sanded down. It's kind of hard to visualize if you haven't done it, but you sand a little here, then a little there to match. If you're not an experienced builder and don't have any experience with fiberglass, this would not be my first choice of a project. You'll also almost certainly have to repaint the entire cowling, so there's that to think about as well.
If the aesthetics bothers you and want to do it, go for it. But I'd really recommend you get a builder with some experience fitting a cowling to help. It might help save you a lot of frustration and potentially some costly mistakes. At a minimum, find a few builders' websites where they thoroughly document the fitting process of the cowling. It'll help you visualize the process and understand what needs to be done.