If you've got a B&Q near you, they were doing small pots of hanging basket plants 75p each - 10 for £6.00.
They were mainly surfinia and million bells petunias, verbena, bacopa, fuchsias, and quite a few other things.
We bought ours a couple of weeks ago, and have taken quite a few cuttings from them.
Otherwise your local garden centre should be selling small plants.
valmarg