A few Simple 3D Renderings from Photos

Please read request carefully. This is a very simple quote request so bids that don't specifically and directly address what I'm asking for will be ignored. Thanks..... I'm trying to take some existing products from pictures and do minor changes to them. Therefore, I need someone who can create some simple 3D renderings based on pictures I have of existing products, sketch them in 3D so that I can show concepts of my designs to people. I just need renderings made as they look in the photos with some minor modifications. This is just to show people illustrations, I don't I need rotation or anything - just snapshots on a plain white background. I'm including a couple of photo examples. Please price based on if you were to do about 3-4 images. Thanks again.