/diy/ - Do It Yourself

Im trying to make a "Keep Talking and Nobody Explodes" game board (the one where all of the modules are). This is my board.

The problem is that i want the modules to be removed with screws, because of the pcb sizes, i need to use standoffs. I cant find standoffs with longer outside screw length. I cant secure the bottom of the standoff, because its outer thread is too short.

Any ideas on what mounting system i can use? Maybe even something completly different. I just want the modules removable and exchangable.