You are going to need to revise your pricing for this one.
You might well find someone around here willing to take an image of your choice and map it so something to be cut on a CNC (or by hand) whilst avoiding the following sorts of incidents
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If someone had the moulds and was bored they might be able to fire off such an image with a laser printer and do the project with epoxy or similar. At which point a Euro plus shipping might be on the cards. As nobody really makes such things outside China though then nobody is going to have moulds -- see the general lack of custom shells about the place. I have been tempted to put something like it together for low volume work for a while but it would probably be a while before whole shell replacement gets tackled in such a scenario.
If you don't want a graphical design embedded within it then you could possibly cut away something with a CNC (would not opt for most home/hackerspace 3d printers for this one, not to mention filament or curing plastic for such things are expensive for as much as you want for this sort of thing). You are free also to price such a thing with a service like shapeways if you like as well.
