The metal sound hole guard seems like a good idea to me. It would mean that there is less outward force being applied to the soundhole by the thong hook and no likelihood of the hook damaging the soundhole rim. Where can you buy these metal guards?
The pick guard looks handcrafted. The medallion has a uke on it, I think the uke may be superimposed on a volcano. My guess is that it is silver hammered to shape around the sound hole.