2003 dvd replacement remote & headsets

Recently bought a used '03 Venture with a factory-installed DVD system. The van didn't come with an owner's manual. Does anyone have information on generic replacement remote controls and wireless headsets. Maybe this is something any car audio shop can help with? I don't want to pay factory prices for cheap, disposable accessories like these.

you can check out www.helminc.com if you do not see what you are looking for call there 1 800 # which is on there sight , most sure they will have what you are looking for