OK, here are some sample images from my DS9 capture:
https://drive.google.com/drive/folders/1W9A_exZvWXeF6OjYvUyQLBnSIINBcbgQ?usp=sharing
All I have done is run a field correction pass (using tfm in Avisynth).
The images are then saved at max quality jpg, to reduce the chance of the image further degrading.
I’m not sure if these will be a better source or not, but worth a look.
@Animaxx - I’ll upload the full unaltered capture file overnight and share with you via PM tomorrow.