I saw the server PSU mount for 2020 aluminum from https://www.thingiverse.com/crypt0zone
Link to model: https://www.thingiverse.com/thing:3106666
I decided to print it out but the height of the PSU opening was larger than my HP 1200 watt power supplies. So I modified it a bit here and there to make it work for me. Actually I remade it from scratch in tinkercad, but give credit where credit is due!
The end cap is for the side with the breakout board is 2mm spot so that the PSU cant move forward anymore.
I also created a custom mount for the x11 breakout board from Parallel Miner. Shout out to them for providing me some dimensions to make this. It provides the often flimsy breakout board with some support by connecting it to the aluminum fame. Not only that, there are two screw holes and nut cutouts to hold it down, I couldn't do the one side as it interfered with the frame. But the board is now stable and even with the PSU.
Hope someone can use these for their build.