Custom Icons/Pins for Google Maps and Virtual Earth

I would like some custom icons/pins/markers designed for use with Google Maps and Virtual Earth. They should be in png format and need to represent the following items: - A High Street Shop (an individual shop) - A Shopping Centre (a large collection of shops in a single development within a town) - An out of town shopping centre (as above but positioned outside a town) The second and third above can be the same design but differently coloured. The approximate size of these should be similar to <[login to view URL]>? or perhaps a little larger.