How to get scrolls for orange gear

How can I get scrolls for the orange equipment?

There is no easy free way. When you keep killing higher level monsters grade 5 scroll fragments can drop, which can result in orange scrolls when you synthesize them. For the rest it is a matter of keeping your eyes open to get orange scroll fragments from special events etc. Before forking out a lot of gold (or money) to purchase an orange design be aware that it also costs a lot to craft (material and steel cost).