Need a source of Lucas headlights

["Charles R. Semer IV" <CRS@gnv.ifas.ufl.edu>]

Dear Net,
        I am restoring an Armstrong Siddeley Whitley. The car, when i 
purchased it had Lucas 700 headlights. I have the original Lucas stock
numbers but I am not sure how they relate to current lamps. Can anyone
identify to me a source where I might be able to get replacement  lucas
headlights.
        You can send your replies to me at crs@gnv.ifas.ufl.edu or reply
on this newsgroup since I read it regularly. 
Thanks in advance for your assistance.
Chuck Semer