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Here are some of the items I could think of for under 200.00
ARC Shift Knob
Mugen Shift knob
Spoon Shift knob
Grounding System
Mugen or Spoon Res covers
Mugen or Spoon Oil cap
Mugen or Spoon radiator cap
Mugen or Spoon Thermo switch
Mugen or Spoon Thermostat
Cusco/Signal/Siebon/J's/Back Yard Special cooling plate
Back Yard Special Front Liscense palte holder or Ricks
S2X CF Guage cluster trim
Ok so far here is everything that you do not already have that you could get for under $200 that would get you some kind of points at a show:
strut bar (front or rear)
radiator cooling plate
spark plug cover
short-throw shifter
shift knob
e-brake handle
pedal covers
side markers
emblems
radiator hoses
battery tie-down
oil cap
radiator cap
hood dampers
resavoir covers
thermostat
fan switch
oil catch can
test pipe (make sure to get CEL fix with it)
driveshaft spacers
lowering springs
lug nuts
brake rotors (do new pads with them though, but I'd say a must if you're running 19s)
CF exhaust cap
tinted windows
lower tie bar
Zoom CF rearview mirror (runs $215 from AJ-R)
Since you're doing shows I didn't mention any used parts, but you could possibly find some used parts that would work for shows. There are a few more little components that could get you points depending what kidn of show you're in, mainly chassis braces. Good luck in the show circuit, sorry if the list is too long!