Most worsted books are city suiting or light jacketing. Suiting books are mostly dark blue or grey, while jacketing books usually are patterned. Hence, a solid green falls in between those two and you will not find many places that offer what you're looking for. However, the Dugdale New Fine Worsted book has an interesting range of greens. If you're in Hong Kong, I would imagine 8-9oz would be the sort of fabric weight I'd be looking for.