Addon to help pick unobtained parts to build a set?

I saw a recommendation in another Transmogs forum thread for this addon:

https://www.curseforge.com/wow/addons/better-wardrobe-and-transmog

The feature list of which includes a lot of improvements in sorting and displaying pieces and sets.

Looks like it’s being maintained (most recent update about a week ago).

I don’t use it so I can’t vouch for it, but the writeup sound promising.