Hey, don't know if you guys with early Minis are familiar with this suppler that specializes in odds and ends for Mk. I cars, (but seems to have other stuff too).
http://www.retrominisltd.co.uk/index.php?main_page=index
I'm not affiliated in any way, I just came across this supplier this evening via the magic of Google.
Cool he sells the plastic light plugs for the mk1 center binnacle. They seem hard to find I got mine used from Willie_b on here. Spitz was looking for some I think So I'll pm this to him.