http://i.materialise.com/
Largest printable size for stainless steel is 1003 x 476.3 x 247.6 mm. You can actually print stainless steel and even a titanium!!!

I'm not a much of 3d modeller, but I can do some things with it and currently I'm thinking to go and put lot of effort to learn it better so that I could offer 3d modelling for individuals that needs part, which they can then print, but it still is bit under question if printable object would be enough good for actual use and if it would be enough low price, however I think in future both answers will be yes, so effort is probably not wasted.
In my current job there is no future really, time has overtook and it is time for change, but that aside, what do you think about printing NLA parts, will it come to reality or do you think it is already reality?
For example Volvo emblems, I think printing them will be really good way to make them, but I think for those cost is too high? If they can do titanium silver and stainless steel it really can't lack of strength, I imagine that it would be possible to make some usable parts?
Indicator lenses?
Any parts you think that would be possible today?
Some custom parts surely might be quite nice to be made that way?
Post your thoughts / ideas, this is quite new to me so I might even fantasy more out of it that there really is.