Adjust existing Visio icons as vector graphics

We are looking to have existing Microsoft Visio 2010 shapes changed from Bitmap to vector graphics. This simply means that they have to scale when resized without graphical artefacts and that they should have a smaller size than the current ones. Important: Aside from the Change from Bitmap to vector graphics NOTHING else is to be changed in the design. The shapes should be optically identical to the ones give as a start base. The number of shapes needing to be adjusted is between 25 and 30 (1-2 may be additionally needed during the Project, thus the uncertainty). Please only bid if you have created Visio 2010 shapes before as vector graphics. Formal details: The selected winner will have to sign a Copyright Agreement waiving all rights to the work and a Non-Disclosure Agreement according to German law. Such agreements are common when working with proprietary designs, there are no extraordinary claims. We can send the text to bidders upon demand so that they know what to expect.