Atrai / Sparky Engine oil leak


Hi all, my wife has a wonderful little vehicle, which I believe is a Daihatsu Atrai badged as a Toyota sparky, chassis number, and I'd plate is Daihatsu, anyway unfortunate it has an engine oil leak which is quite bad, is there anywhere I can get a workshop manual for it, I'm handy with spanners but it's always nice to research what your doing before you start, I've seen full engine gasket / seal kits available so hap to pull it apart, any hints tips advice greatly appreciated. Many thanks.