Back on track, looking at the pictures in the other thread, only Plod would drill an MV6 bumper for a pair of Whelen 500 TIR6s 
2J1 = COVER,FLOOR INNER,STANDARD
80I = INTERIOR-BLACK
80X = BODY INTERIOR TRIM-BLACK
87L = EXTERIOR PAINT,SEE MODEL CATALOGUE FOREWORD PAINT CHART
A32 = ELECTRICALLY OPERATED WINDOWS,FRONT
A33 = ELECTRICALLY OPERATED WINDOWS,REAR
A50 = UP TO YEAR 2000 LAUNCHED MODELS = SPORT SEATS, FROM YEAR 2000 LAUNCHED MODELS = COMFORT SEATS
AJ3 = FOR DRIVER AIR BAG
AJ4 = FOR PASSENGER AIR BAG
AM9 = REAR SEAT,SPLIT COLLAPSIBLE
AP0 = FOR SIDE AIR BAG,LH
AP1 = FOR SIDE AIR BAG,RH
AR6 = BELT,REAR SEAT,CENTER,3 POINT
AT0 = HEAD RESTRAINT,REAR,CLOTH,FULL
AU0 = DOOR LOCK,WITH REMOTE CONTROL
AV7 = USED WITH REMOVABLE CARGO RESTRAINT
AY5 = HEAD RESTRAINT,REAR,CLOTH,CENTER
B18 = ORNAMENTATION,ALUMINIUM
C60 = AIR CONDITIONING
C68 = FOR ELECTRONIC AIR CONDITIONING
C87 = READING LAMP,REAR
C90 = DOOR LAMP
CE4 = HEADLAMP WASHER
D44 = COVER,MIRROR HOUSING,O/S,PAINTED
D63 = BOX,DEPOSIT,FLOOR,FRONT
D64 = VISOR,SUN,WITH ILLUMINATED MIRROR,PASSENGER
D74 = VISOR,SUN,WITH ILLUMINATED MIRROR,DRIVER SIDE
FE9
GU8 = AXLE RATIO 3.90
K09 = ALTERNATOR,120AMP
KA1 = FOR HEATED FRONT SEATS
LA3 = 32 PETROL ENGINE
ML4 = AUTOMATIC TRANSMISSION,4 SPEED
N33 = FOR TILTING STEERING COLUMN
N89 = WHEEL,ROAD,ALUMINIUM,71/2JX17
NC0 = EQUIPMENT,EUROPEAN UNION
NF2 = EMISSION,3 WAY CATALYTIC CONVERTER,VARIANT 3
NP5 = STEERING WHEEL,LEATHER
NV7 = POWER STEERING,VARIABLE EFFORT
QUE = TYRES,235/45 R17-94W
R12
RHD = RIGHT HAND DRIVE
T6B = TRIM PANEL,INNER,STRIPPED
T72 = HEADLAMPS,LH TRAFFIC
T96 = FRONT FOGLAMP
T97 = HEADLAMPS,XENON
TN7 = BATTERY,66AH
U07 = HORN,FANFARE
U1A = RADIO AM/FM STEREO,SEEK,MULTI CD,ETR,NAVIGATION,FADER
U3F
U53
U85 = SPEAKER,8
UA6 = ANTI-THEFT WARNING SYSTEM
UC1 = SPEEDOMETER,ASSY.,M.P.H
UF6 = LAMP,AIR VENTS
UJ3
UV5 = MULTI-FUNCTION DISPLAY,VAT3
UY3 = TELEPHONE D-NET
VG2 = PROTECTION WAX,DELETE
W1Y = FOR STEERING WHEEL RADIO OPERATION
W4Y
W6J = TRIM,CLOTH,SPORT,VARIANT 2
W7P = NAMEPLATE,SPORT
W9M = FOR ADDITIONAL ONSTAR OR NAVIGATION SYSTEM PARTS
XJ2 = LOWERED SPORTS CHASSIS
XN8 = FOR GREAT BRITAIN
XQ2 = FOR VAUXHALL
Z1B = NOZZLE,WASHER,HEATED
Z1G = SPEEDOMETER - MILES
Z3R = LETTERING,MV6