If it is on Trulia, the listing broker info should be there also. I suspect that if it is not on MLS, it won't be on Realtor.com. Realtor.com receives data feeds from MLS; Trulia sources many brokers, publication, syndicators, and a few MLSs in the hunt for data.
You can also simply call a Realtor in your local area who can research it for you. Perhaps someone from the Farmington HIlls area will read your post and respond. If not, call a local Realtor and request they look up the info for you. It won't be hard to find someone who will do that.