The normal version still has NydiamarMainCampaign included, although not updated (does not matter, as long as the items won’t get removed).
I removed NydiamarMainCampaign from the version with the Diablo 3 classes, so I assume you are playing with them? You can still play the classes in the normal main campaign, just download and use the Diablo 3 Classes mod directly — all Nydiamar items will be gone, so you either put them all into your personal stash (especially the Level Token), or you can’t play Nydiamar afterwards again with this character. Do a backup of your character to be safe, since I did not test this.
Really did not expect someone to use it, so I did not bother to add it (since it would have required some work), but if you want me to upload it, then go ahead and ask!