Suggestion: Add in tier sets that never made it to the game.

I wonder if it would be feasible for you to make it possible to transmog items that never made it to the game. There are several examples of this over WOTLK raid tiers. For example with most of the raid tier sets you cannot actually complete their looks due to them missing their boots and belts. They are in the game files however, not just tied to any item in the game. You can see them with WoW Model Viewer.

In addition there are entire raid sets recolors that were never added. Such as the one Saurfangs son uses which is the yellow variant of the DK-armor.

Here are some links from mmo-champion in which you can see some of the missing recolors as an example:

https://www.mmo-champion.com/content/497

https://www.mmo-champion.com/content/1589-Tier-10-Armor-Sets

No source file, test, or entry point is named. Review the missing WotLK boots and belts and the unreleased recolors shown in the linked MMO-Champion pages, then compare them with the game-file assets visible in WoW Model Viewer; done would mean defining how those items and recolors can be made available for transmog.

Written by the indexing model from the issue text.