Believe it or not, the ceramic "screw-it" type connectors you speak of are still a recognised connector, but have been updated to current regs. The must be enclosed in a box with suitable strain relief. This site is American, but they are available in most electrical wholesalers
http://lighting.freightliquidators.com/product/5/11917/Ideal-30222-Setscrew-Wire-Connectors-2210-Awg-100-Pack.html