Wedding Photo Retouch & Blend

I have wedding shots of my mum and dad standing with other guests. They never posed together on the day, so I need one convincing portrait that shows them side-by-side as if the photo had actually been taken at the event... (Budget: £10 - £20 GBP, Jobs: Graphic Design, Image Analysis, Image Processing, Image Recognition, Photo Editing, Photo Retouching, Photoshop, Photoshop Design)