Your search for hdmi wall plate returned the following:

HDMI wall plate

IN STOCK

• 1 front female HDMI jack
• 1 rear female HDMI jack

HDMI wall plate with two female HDMI jacks

OUT OF STOCK

• 2 dual (front and rear) female HDMI terminals
• 1 internal jack angled at 90°

Wall plate with female HDMI terminal

IN STOCK

1 person says 

• dual (front and rear) female HDMI terminals

HDMI coupler plus two keystone ports

IN STOCK

• coupler lets you connect an in-wall HDMI cable to a separate HDMI cable for an audio/video component
• two blank keystone ports let you add optional connectors
• installs in a single-gang decorator plate