I don't see the problem in finding a baseballbat http://www.amazon.de/gp/product/B001VC4TCG/ref=s9_dcbhz_bw_d0_g200_i1_sh
But of course it will be considered a weapon. it will be hard to explain to the police what the fuck you're doing with a baseballbat, wearing a balaclava in front of the trainstation.