Because I am bored...
1.
Items --> Lookup 2. "Deviate Scale Belt
3. Which leads to
The Deviate Scale Belt Item Page 4. Click the convenient link to the right, entitled
Created by: Deviate Scale Belt 5. This has links to three required items:
A.
Perfect Deviate Scale x10 B.
Deviate Scale C.
Fine Thread Each of those links directly shows what each item is used in, which mobs drop said items, in the case of Deviate Scales where they can be fished, and in the case of Fine Thread where they can be purchased. All in a few clicks using the free to use item search system. Further reading of the posts in each page, although very cluttered with repetitive information, will point you in the direction of effective sources.