Repair my corrupt Jpg photos

I have many hundreds of corrupt family photos (all jpg files). The images are visible (in the main) but corrupted with steaks or missing parts. I have seen on the web that people can correct many of these corruptions, but have not been able to do so myself. There is a lot of profitable work here for someone who can help me. Here are three sample files.

IMPORTANT: These images cannot be recovered using photoshop alone - they are compressed jpg files with small amounts of data corruption (from a hard disk failure). Some have missing areas but the way they are missing (and from the research I've done) leads me to believe that clever manipulation of the data in the files (from someone who understands jpg files) can mean many of them are recovered. The price I have quote is a guide, we agree an initial batch of images (say 100) and a fee per 100 images depending on how long it takes to recover those images. I am willing to pay very decently to get these images back.