3D Model design with Blender. (Urgent help needed.)

Hello, I need help with an art project. I've created a 3D model in Blender combining purchased models. It's a transparent cow with a packet of supermarket cheese in its stomach (see attached screenshot). I've almost completed the model, but reached the limits of my self-taught skills - the texture is not applying properly to the cheese packet. Can you apply the texture for me, take any other steps necessary to prepare the model for 3D printing and export the model as a 3D print-ready file with dimensions that are no bigger than matchbox (5.2cm x 3.5cm x 1.5 cm)? Can you also give me a list of the steps you had to take to finalise the model (not detailed, just a list of broad steps like: reapplied texture, exported the model etc) so that I can know which youtube tutorials I need to watch to improve my Blender skills? Optional: I'd like to skype for 15 minutes so that you can tell me in more detail how you corrected the texture problem. Only if you're available. Could you give me an estimation of the hours you think you'd need and a quote? I need to send the 3D model to the printer by the end of the week so I'd appreciate your assistance quickly. Looking forward to hearing from you. Best wishes, Julius Hinks