Here are animations of C/2023 P1 from the 1Kx1K FITS files for STEREO A
HI1 for Sept 17 and 18.

http://nickdjames.com/STEREO/20230917.gif
http://nickdjames.com/STEREO/20230918.gif

They are processed using the method set out in:

https://www.stereo.rl.ac.uk/Documents/HI_user_guidejuly.pdf

I haven't found anything equivalent online.

I'll update these as the raw data becomes available.

Nick James