Instagram Photo Subject Swap

I have two images and need a single, seamless composite for personal use on my Instagram. Please take the brown guy from Pic B and replace the brown guy in Pic A without altering anything else. The end result must look completely natural at full resolution; seamless integration is the top priority... (Budget: €8 - €30 EUR, Jobs: Graphic Design, Image Consultation, Image Processing, Photo Compositing, Photo Editing, Photo Retouching, Photoshop, Photoshop Design)