If it was a smaller job, the phone company had a fleet of smaller cargo bikes.
But keep far away from these guys; they work for 1e Hoofdstelijke Kattenbakcentrale, or First Capital Cat Central, a kitty litter exchange service. They come to your house and take away the old cat litter and supply you with clean litter. Sounds like a great business plan.
There even used to be cargo bike races. I wonder what combination of difficult parking, high fuel prices and congestion charges would make this way of doing business viable again.
See Warren's great slide show of Cargo Bikes Getting the Job Done