No - unfortunately not yet, maybe not ever. I think it was a bit of a PR exercise by Lexus when they got wind of the Alpina 320d.. I might save my 2000euro for the kit if it does materialise and eventually (wife permitting) chop in for a 450h as I had one all day today and they're awesome - in both engineering and performance. I can put up with the small boot and large loan for that kind of car.
On the mileage thing I only get around 41mpg if I'm lucky and sub 35's if I'm not. I remember mentioning some while back that good quality diesel affected the mileage. I'm not so sure now as I ran for a while with BP ultimate, and then without - although not scientific I just got the feeling there was no real difference.. What I have noticed though is that you seem to get better MPG when the weather is warm. Hot days = good mpg in my book, even when the aircon is on full blast.
I think most of us on the forum have realised that the 220d is just heavy on fuel - maybe because of the weight of the car,maybe because of injector and ECU maps, maybe because of the supposed euro 5 rating (confirmed?). Even so I still enjoy driving mine - comfortable, quiet, swift, great audio, lots of toys, still fairly rare, and even after a few dropped balls, good customer service. I still would buy another...(450h!)
Thats my 2p anyway.