Replace Images in PDF

I have a PDF that is otherwise final, but a handful of the images are not correct. I need the existing graphics replaced with new ones new ones—no more than four in total. All text, layout, and page dimensions must remain exactly as they are; only the specified images change.

1. The image should just show the bag unfolded at the top with a receipt on it which would show the items that are to go in the bag. The slot or part of it would be visible. The slots on each bag are to be the same size.

2. The bag folded down twice would only have one line and not two.

3. The image should show the top of the bag folded down with only a single edge. The image should show the receipt on the back side of the bag since it hasn't been sealed yet.

4. The image should show the receipt now sealed together above the top of the bag and once again there is a single edge on the folded down bag. Some text or marks could indicate that's the receipt shows the content.

The circles need to be complete and consistent around the images. There appears to be boxes around the circles that conflice with the overall blue background that needs to be cleaned up.

This is actually being used to print a 4" x 6" digital label.

Please return:
• The updated, press-ready PDF with all replacements in place.
• A version of the file that retains editable layers (Acrobat, InDesign, or similar) so I can make future tweaks if needed

Accuracy is critical, so each new image must sit perfectly within its original frame without pixelation or cropping errors. Let me know which software you plan to use and your estimated turnaround time; speed is a plus, but precision is essential.