Have XJ12 with factory facelift front spoiler (spoiler has code in the "W" VIN)
Car was special order import for a company CEO.
Repairing a crack -- it's fibreglass.
Could make a mould if anyone interested.
Don't know whether the part is available in UK.
Looks great and works.

 

Pics???

 

There were no spoilers on the Series I to III cars, and no fibreglass used in or on the bodies. You are perhaps referring to a totally different model? This forum covers the Series I, II and III cars from 1968 to 1992 ONLY.
Yes, a photo would allow identification but I suspect you may be referring to an "xj81" model (that is a V12 in the xj40 body).

 

Sounds like an XJS "fac perhaps a moderator can catch and move... e lift
designation...