I used a company called Bayporter Express. If you google it, I am sure it will come up. If not, let me know and I will dig out the website address. Believe their vehicles seat upto 7 and as there was 5 of us, the price was for the whole van. Whether you have to share if there are less than 5 I dont know. We just split the cost between us and think the cost of a return journey from Airport to Fishermans Wharf was £12 each. After arrivals you ring a number and wait for van to arrive. They were on time going back to airport. Would use them again. Hope this helps.

We travelled in the opposite direction, from the Fisherman's Wharf area of the city to SFO, two weeks ago and we took a cab. It cost, including the tip, around $45 and between four of us it was cheaper than using one of the shuttle services.

thanks for the replies
i just wish oct,would hurry up & arrive!
tracy