Once again Australia leads the way.
Queensland Roads can change the colour of your current plates (from green to black) for a bargain $150.
www.ppq.com.au
However, if you would like a personalised 5 digit jobbie, that will be $450 thankyou, while a "prestige" (??) plate will cost you a measly $900 to $4000 depending on number of characters - the fewer the more $$.
But you do get 2 plates for your money 'cos if you are caught driving with only one plate (say at the back), there's a rather significant several hundred dollar fine......