I'll hassle for delivery prices and availability of the new ones (I think you'll need the extra power), and I'll pm you with details
In the meantime, I'd suggest looking at ebay for a "switch-mode laptop voltage converter" - mine cost around £6 plus carriage, and is excellent for running off batteries (you CAN run the normal "mains brick" off your inverter, and it's often done, but to save a LOT of power, go for the switch mode job). My laptop uses 2-3 amps that way, using the mains brick, it climbs to nearly 7 amps
