Try John at Digital Speedos Spike:
http://www.digital-speedos.co.uk/
He has started to sell a type 9 adaptor for digital speedos, i dont think he has started to list them yet but he does sell them with a speedo kit. I can sell them but as part of a kit - i'm sure he will sell them on their own if you contact him. Tell him Andy from Saturn sent you, they ain't too much anyway. David Murray has just received one as part of a kit.
All the best AndyH