The other topic is about the Fairphone 2 case, which you can easily buy in different colours in the Fairphone shop.
The Fairphone shop also sells spare parts for the Fairphone 2.
The only part the Fairphone shop doesn’t currently sell is the core module, you can currently buy it here …
https://www.vireo.de/fairphone/zubehoer/8632/fairphone-2-core-modul
Else you could open a topic in the Market category to look for what you need. (Ok, was already moved here.)