In the program "Mod Tools" I found these faceplates and a description of them:
1) Name: The Relic Faceplate. ............. Description: This is a relic faceplate for Relic staff
2) Not sure, but i found this:
Name: War Effort Participation. .................................................. .............. Description: Base War Effort faceplate with 3 (Bronze/Silver/Gold) frames.
Name: War Hero - Gold Medallion for your contribution to the War Effort ...... Description: Gold participation
Name: War Hero - Silver Medallion for your contribution to the War Effort. .... Description: Silver participation
Name: War Hero - Bronze Medallion for your contribution to the War Effort. ...Description: Bronze reward for participation in the War Effort
3) Name: Exclusive - Field Marshal. .... Description: Special WFA preorder faceplate for OKW faction.
4) Name: Exclusive - Old Glory. ...........Description:This is the special WFA preorder faceplate for US Forces
5) Name: Purple Heart. ........................Description: Special WFA preorder faceplate for US faction.
6) Name: Blue Max. ............................Description: Special WFA preorder faceplate for OKW faction.
7) Name: Community Map Maker. ........Description: Given by community managers to map maker of the month.
source:
http://community.companyofheroes.com/forum/company-of-heroes-2/company-of-heroes-2-general-discussion/127251-how-to-get-these-elusive-faceplates-apart-from-the-two-for-pre-order