Robbie is right, however.....
The guys I have bought a few of these kits on also do the gateway 100 with the optional bluetooth adapter. The items I bought were:
Gateway 100 £104.96 (includes cable, dont select dock)
Passive Cradle (for charging) £29.97
Brodit Bracket £19.95
The addon bluetooth is another £44.65 but is currently out of stock (and has been since I have been using these guys)
Great service, both orders have been with us next day!