Hey there, I am in the same situation.
My screen has a crack in it, so I am ordering a replacement from Alibaba soon, but it seems like there are 2 part numbers associate with this iMac model:
Please let me know if you have found a solution.
Hello Gabriel, I have the same question as yours. Some said that is impossible due to different bios chipset version for the Cannon Lake. Have you found or tried upgrade it to the 2018 intel core?