Looks like I’ll have to answer my own mail!
As I said, I got a key blank with very little difficulty (from the USA) but the best any local key cutters could offer was the information that a special machine is required and that I should try the Alfa dealer.
With absolutely no expectation of success I rang my local Alfa dealer… they didn’t even know what a GTV6 was! I then tried the best Alfa dealer in the UK (Mangoletsi) and although they were very sympathetic and knew exactly what I was taking about, they could only advise that they used to get the keys cut by a place in Bolton that has now closed down. I then spoke to my local independent (Euan at CP Garages) and he couldn’t recall ever needing to have this type of key cut. Alex Jupe was in the same situation.
Finally I tried Alfa UK (don’t laugh!) and they didn’t even bother to reply to my enquiry! So thanks for the suggestion Scudetto but I did try the Alfa route.
I continued my investigations using the most valuable tool available to classic car owners… and of course the internet came up trumps! So for any of you out there who might need a GTV6 high security key, I suggest you try www.keys4classics.com
They’re in Australia so you need to make a holiday of it… not really. If you have the code, they can cut the key for you or if like me you don’t have the code, just send them a good quality digital photo and they can cut the key from that (they will also tell you the code number). The point is you need the key to get a new one so I got a couple done just to be safe.
I’ve now got the keys – they work fine and considering they were sourced half way round the world, the cost was very reasonable.