It's not showing on their website, but this wreckers had a 1979/80 264GLE with a front lip a while back. Might be worth a call to see if they still have it...
That style of lip was found on some 242GT's here, and on 1980 264GLE and 265GLE. Probably some 262c's as well. They were in the accessory catalogues as well. Needless to say, they aren't common in Australia.
I have one, condition is poor though, it would need some repair before painting.