Are you talking about the extra items that make the car a Bullitt or the options that you could get on a Bullitt?
To my knowledge the only option is a Mach460 radio.
From Road & Track, December 2001, Volume 53, Number 4, Page 80 -
17" Alloy Premium Wheels
Unique Side Scoops
Unique C-Pillar & Glass
Brushed Aluminum Gas Filler Door
Brushed Aluminum Tail Pipe Extender
Brushed Aluminum Shift Ball
Brushed Aluminum Shift Ring - really plastic
Brushed Aluminum Foot Pedal covers
Instrument Cluster
Articulated Sport Seats
Sub-Frame connectors
57 mm Throttle Bodies
Cast Aluminum Intake Manifold
No Fog Lamps
Retuned Exhaust System
13" Brembo Brakes Front/Rear
Red Pony Brake Calipers
Lowered Suspension
Stiffer Springs
Revalved Struts/Shocks
Different Anti-Roll bars