Site for collecting blueprints of Lego drawings for real world applications

I have a Google Nexus 7 stand made of Lego (duplo to be exact). Why isn’t there a site to upload a picture and maybe a construction drawing?

Can this drawing be in a well known, open, format? so it can be used to send as an order to Lego themselves?

And then add 3D printing drawings for even more real word applications – print a brick that fits in an Iphone charging port to make the stand fit better.