Nevermind, I found the answer.. I can use
S3OC to scan through all the objd files in the Ambitions EP and managed to find the object name for it and the instance id.
Although I couldn't use the instance ID to make the prop appear in game after adding it to the jazz file for some reason. I suspect it has something to do with the expansion pack requirement.. The base game props appear when I use their instance IDs. I guess I'll have to do more digging