Edit Image - SIMPLE & URGENT - repost

Hi, This is a quick and simple job. Basically we require an small image (two people in the image) to be photoshopped - an image from the original image to be cut out and a new image to be photoshopped into the photo, with it looking entirely natural - almost impossible to notice it has been photoshopped. The reason for the above being is we are currently preparing a Campaign and the user of the image no longer wants to participate in the campaign so instead of doing the entire shoot all over again we need the individuals image photoshopped out and the replacements image photoshopped in This project is for only 1 photo, however there are other photos but we are not sure if they will be used in the campaign yet, so there is room for future work if you impress. This needs to be done within a day/two days. I will look to reward the project immediately. Budget will be low, no more than $20 preferably. Whoever I award this project to will be supplied with the images immediately and be trusted that all detail and images stay confidential due to the sensitivity of the campaign.