EXIF Metadata Modifier for Web Images

I am looking for a skilled freelancer to create a program that can modify photos saved from web pages, altering their metadata to make them appear as if they were taken by a specific camera model. The tool should allow me to input saved images and select from a list of camera models, updating the metadata accordingly.

Requirements:

Develop a user-friendly program that accepts images saved from websites.
Implement functionality to modify EXIF metadata, including fields such as camera make, model, and capture date.
Provide a selection of camera models for the user to choose from when updating metadata.
Ensure the modified images are indistinguishable from photos originally taken by the selected camera models.
Deliverables:

A fully functional program with clear instructions for use.
Source code with comments for future modifications if necessary.
Budget:

I am offering a payment of $50 upon successful completion and delivery of the program.

Additional Information:

I have encountered issues with platforms recognizing photos saved from websites as non-original, which has led to challenges in posting certain content. By modifying the metadata to reflect specific camera models, I aim to overcome this obstacle.

If you have experience in image processing and metadata manipulation, please reach out with your proposal and any relevant examples of your work.