OK, let me see if I can help out a little more. We have a 2008 MS 36 TK3 with a fireplace. Based on the owner's manual diagram of the switch pattern, we have Model # 23EF003GRA.
The co is;
Twin-Star International, Inc.
Delray Beach, FL 33483
The fireplace is made in China.
Customer Service phone number is 866-661-1218
www.twinstarhome.com
That's all I've got. Hope it helps.