thanks Fred - our Audi radio has no alt input - if may have on the back - too hard to get at!
thanks Nik - I have done that
I ordered the hands free kit as per the original post. It does what I wanted and charges the HD and has a jack which goes into the socket at the top and then this is output from the speaker that is built into the power adapter. It works a treat! (and also is a hand's free kit). It connects to the range of Herbert Richter's mounts which I have read are good.
For UK reader info, I want to say a word of thanks to PDA Hut. Their comms and delivery are very good. Answered my queries fast and delivered an order that I placed yesterday at 1600 hrs at 0830 this AM. No Connection etc - just happy with their service.