South Africans have raised almost half a million in a BackaBuddy campaign to purchase a coffee machine for Durban Hawks policeman Karl Sander. The senior narcotics investigator made headlines this week after testifying at the Madlanga Commission of Inquiry into police corruption. Sander, who has over 40 years of service, claimed that thieves stole his machine, which was never recovered. MADLANGA COMMISSION: HAWKS’ KARL SANDER HEARTBROKEN OVER ST…