For RawTherapee there is a nice collection of Hald Color Look-Up Tables, that i was missing in Affinity. So i started to programming and 400 Lines of c++ later, i had a nice converter... Over 300 LUTs of (old) analog films (BW / Colour) and colour effects. Look at the attached ZIP-File. (80 MB compressed, uncompressed 365 MB) The HaldCLUT LUT-Files are not created by me (one exception).
License (CC BY-SA 4.0) is included. Have fun with it... ps.
I am thinking about to relase the converter(Win/C++) (MIT-license) too. If you interessed, write me a message/post. HaldCLUT_for_Affinity.zip