https://www.wowhead.com/quest=51976/sabertron (seems like you already have that one)
https://www.wowhead.com/quest=51977/sabertron
https://www.wowhead.com/quest=51978/sabertron

One is still missing, seems like it's not on Wowhead yet. Maybe it's 51973 or 51974 (those two are near the other Ids and unknown to Wowhead right now).

Yes, that's for green. It was active a few weeks ago.

From wowhead:

By default it spawns in red color, to get a different color you have to do a world quests on Sabertron.
There are 4 world quests on it with the same name, the difference is that each quest spawns different color.

Looks like we need only one more. I'll add the other two quests.

https://www.wowhead.com/quest=51977/sabertron (yellow Sabertron) is up on EU right now, but the addon didn't notify me although I was still missing it.

Thanks for the report.

My bad. I didn't add the quests.

I added both IDs in the new version.

Thanks again. A new version is on it's way.

Was the orange version active already? The ID is probably 51978.

http://www.wowhead.com/quest=51974 is up on EU right now and is the copper one. Wowhead doesn't know about this quest right now, but I got that ID from an ingame addon.

I don't have the orange one personally, but yes, it has to be 51978.