D&D 5E DM NEEDS HELP WITH EPIC LEVEL MONSTERS

[IloveD&D]

Firstly Sorry for my English if I get something wrong, it's not my first language.
Hello everyone Dungeons and Dragons DM in need for help with Epic level stuff, so it's all homebrew stuff nothing official.
If someone bought the "Beyond CR 30" manual from Total party killer on DMs Guild could you help me create Monsters from CR 36 to 40 (with their CR system) since Total party killer dind't make them or can you share your Monsters from CR 36 to 40? Or maybe could you suggest something interesting for the creation of these monsters?

 

[IloveD&D]

I was also wondering if you or other purchased the "Beyond CR 30" manual from DM's Guild because I mostly need help with the system that the manual propose since (I created A LOT of Monsters for this campaign but with this I wanted help from other DMs) for Epic characters since they are at level 50 with epic levels.