Hi Jonny,
I have a feeling it might be a major exercise to transform to naked as I had a thought about doing the same.
The headlight for one on the naked is round and will use a different mounting system and the radiator fairing would need to be changed as it currently mounts to the main fairing and on the naked there are different panels attached to the tank which at least has the holes.
Strangely enough the indicators look to be the same as the rear ones.
I think I saw a Sprint fairing (like Bert's K75) advertised on UK ebay or the other option might be an RS fairing which would be my personal favourite.
I think Motocol would probably have the best information as his is a really nice conversion from an RS to a "/2" which is essentially naked.
Regards,
Phil