'Tis alright, Peter. I've just been havin a browse around a heap of car & truck accessory sites to see if I can get a firm lead on one. I know Steptoe's got a hole in the front of his and will been needing a replacement soonish.
I'm also looking for some headlight protectors. Do you remember the ones that were just convex flexible perspex that fitted over the light and held in place by the surround. Sort of like a clear bubble.
When I first moved up here to Childers, I bumped into a chap who had an immaculate RH and he had one of those protectors on it, so someone does make them to fit an 8" light.
Given that these lights are rare and expensive to replace, that'd have to be a very worthwhile investment.