SWTOR Collector's Edition and Security Dye Modules Guide
There are a few more ways other than the Cartel Market and the Crafting to obtain Dye Modules. These include Repuation, owning a Collector's Edition or owning a Security Key. These items around bound once bought.
Collector's Edition Dye Modules
You must own a Collector's Edition to purchase these dyes from the Collector's Lounge.
Security Key Dye Module
You must own an active Security Key to purchase this dye from the Security Vendor.