Rotoscopy of 25 sec in 4K - where greenscreen went wrong

For a short sequence of greenscreens that were not properly set we need to rotoscopy / cut out the kid-actors...but I just have no time at all to do it. It must be done in professional way by people familiar with rotoscopy.
I can provide it in 4K-sequence (png), and would be delighted to get it back in 4K, but HD is ok as well.

Preview: https://youtu.be/k4yTD8bzxfo

This job will be online around 2 or 3 days, I provide the footage very quick via online download link.
Delivery till 20th of August is mandatory.

Jan (producer)
- from Berlin in Germany -