I have a Gen II Screw and have no head restraints for the rear seats. Does anyone know of a mod to resolve this issue?

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2001 F150 Supercrew
Island Blue
4.6L V8
Med Graphite Interior
Power Windows & locks
Keyless entry
Power adjustable pedals
AM/FM CD
16in Polished Al wheels
Ford Duraliner
Bed extension cage
Tow package