Poundstretcher are currently stocking a plastic toy bendy bus for £7. (well the small Brigg store was)
I did not have a figure with me but it looked good for 28mm / 32mm going by the drivers seat. Available in red or blue it looked plasticky but a coat of paint, a few scratches and the odd zombie would sort that
I've checked their website and offers leaflet but no sign of it and I did not think to take a picture
Andrew