Usually, it's best dat u see and judge it urself...one man's meat is another man's poison...etc.
Body kits? probably won't find much in the market unless ur good at mixing and matching - it's not what i'd call a mainstream, popular model these days (it is from the 80's after all)..but i heard that people like bumifibre can custom for u...and im sure there are plenty other fibre customisers in KL and JB.
Parts? good luck...there are people like Z-monster (from Hybridz forum) who really know the 280zx...he's got quite a knack for finding things...