P3 D65 to Rec. 2020 LUT or Other Way To Convert Footage Color Space?

I have a project where the client had us do a color grading session on our footage where we output a tiff sequence in the P3 D65 Gamma 2.4 color space. Now, the client got a different projector and would like us to deliver in Rec. 2020 color space. As you can imagine, when I change the AE project color space to Rec. 2020 Gamma 2.4, as well as the color space for the tiff image sequence of the footage, the changes are quite drastic. Does anyone know of a LUT or other way to convert from P3 D65 to Rec. 2020?

Thank you for your help and time!

Best,

Lucas