We are designing an iPhone case with some alterations from a simple iPhone case. We have 2D and simple 3D designs of the case we are looking to design. If you have designs of iPhone cases and have cad design files you should be able to simply be able to integrate and add/change the design to our specifications. An example of the case [url removed, login to view] and [url removed, login to view] our design does not duplicate the design but is similar. We also have several other iPhone case projects that are more complicated and when this works well and we like your work there is more projects to work with. We also need a prototype made, so if you have 3D printing that is a plus but not necessary. Pay depends on your skill.