Cheap anamorphic effect for 4:3 projector?

I have an old LCD projector Phillips Proscreen 5000. It is powerful but does not have a wide screen option. Is there a way I could BUY or jerry-rig an anamorphic filter or fresnel lens on the front of the projector lens to widen the projected image? (it is used during a rock concert, on a large screen above the heads of the band, therefore, high resolution is not the primary concern) any thoughts would be greatly appreciated. If this is not the right forum, I apologize, and would ask to be redirected. --Dizzy

First place I’d look is edmund scientific