Browsing round Tescos Allerton, Liverpool last night, and near to the mobile phone display had a number of in car chargers for the following makes of mobile phone that i could see...
I actually picked up a multi adapter one for £3.35, which has connections for all of the above so it will do to keep in my car for my Nokia and my girlfriend's Sony Ericsson.
You just put the connection on for the phone you need to charge at the time. Perfect.
These are just generic makes not the manufacturers, but they had these to next to them at between £10 and £20, which is a bit of a contrast!