Same thing happened to mine. I bought a 7" touch panel from DigitalWW which he said was from a Lilliput monitor, but when it arrived I found out that the connector on it is incompatible with the one used on mine. The touch panel from DigitalWW had 1mm pitch connectors while the original Lilliput touch panel used 0.1" pitch connectors so I returned it to DigitalWW. I'm still waiting for Armen to reply to my request for a refund.
I would suggest that you open up your Lilliput and check the connector used on the touch panel and tell Armen which connector you have before ordering. Also, DigitalWW has a 7" touch panel on their website but the physical size is slightly wider (169mm) than the original touch panel (165mm) - not sure if this would fit the Lilliput housing without some dremelling.