Does model th-c42hd18 require only a panasocin wall mount bracket. Seems others do not work

I am not familar with your exact model but my Panasonic TH-42PX600U 42 in. Plasma uses a generic brand wall mount. The first mount I bought would not fit so I returned it and bought a different brand which worked well. Start shopping your local stores (even walmart has a couple of different types to choose from), carefully open the packaging in case you need to return it and see if it will fit the mounting holes on the back of your TV. If it fits on the back of the TV then you should be good to go.