Just came across this original price list for the S1, thought it may be of interest:
Slightly puzzled by the ‘hardtop’ option! 
I can do a hi-res scan if anyone wants a copy for their history file 
Was the carbon air box and alcantara interior trim later additions to the spec?
Possibly so? Also found this, dated a bit later (1st Sept 2000)
interesting, thanks! What were the “driving lights”? The lights down with the front grille between? I thought these were a standard on all Elise/Exige?
They were an option on both. 
really? i can’t recall that i have ever seen one without
A good portion of the S1 Exige were built to dealer or factory spec rather than expectant customers, so many were fitted with extras and distributed to dealers for stock, hence why you could assume such cars were standard trim IYSWIM.
ISWYM
With all the talk about it i’m starting to miss my Exige. Still two months wait until i can bring her back home.
Have the original sales invoice for my Exige:
£36,150.00 - worth every penny