You know this Google Doc?: https://docs.google.com/spreadsheets/d/1fkCwu0zeX1BBGcNEzWGZDr2kQ0IOPSoZQK2FD-zpw1M/htmlview?usp=sharing#
I've farmed several of these enemies, and so far, the doc has been right about who drops what. I believe you can update a huge chunk of this wiki with help from this link.
For example: I can confirm that the Wagon Wheel, and the Moxxi's Endowment artifact, do indeed drop from Tink Train, a Tink/Goon combo who spawns in the room beyond the dead Claptrap in Guts of Carnivora (there's no article on TT in the wiki, btw).
In the wiki, the Brightside is classified as a World Drop, however, like the doc says, I got quite a few of them from the Bronson Family in the Blastplains; any member can drop it
The DE4DEYE class mod, for FL4K, definitely drops from Vice, one of MoG's pet Grogans
So what do you guys think? Use the doc to update the wiki?