Some people have made their own version of the DVMEGA Cast display. The source code is available for this. You can download it from the following link:
https://www.dvmega.nl/update/doc/BlackCast125.HMI
I would also like to invite everyone who has made their own version to share it via the DVMEGA Cast Users Facebook group:
https://www.facebook.com/groups/307759913243056/
Guus, PE1PLM