Why? Seriously, why? The real ones are ridiculous superstition enough as it is, but pretending somehow that the manufacturer puts genuine (?) supernatural properties into their Magic 8-Balls to make them work, then a computerized random number generator simulation would lack this "authenticity" and give you less accurate results. That all assumes you believe they work. If you don't believe they work, then you realize they'd both give you roughly the same results (ignoring the fact that computers can't produce genuinely random numbers), neither of which would be of any use.
Instead, how about you just bookmark
www.icantdeci.de and get a statistical answer to your question derived from genuine human opinion? Seems much more valuable.