Hopefully you are aware of this project to generate random numbers: https://www.fourmilab.ch/hotbits/ https://www.fourmilab.ch/hotbits/ If you follow some link

Hopefully you are aware of this project to generate random numbers: https://www.fourmilab.ch/hotbits/ https://www.fourmilab.ch/hotbits/ If you follow some links you will get to Aware Electronics, where you will find some stuff priced in the $200 range. It really depends on what part of the world you're from as to whether or not that is "affordable".