A DIY solution for IDC cable
IDC stands for insulation-displacement contact; it works by having a set of tiny blades that pierce the insulation. If you undo the clips at the side of the IDC connector you can take the back off and dismantle it to see how it works.

It should be perfectly possible to buy a set of crimp connectors, cut off the IDC from one end of the cable and start stripping and attaching crimp connectors to the wires. A little time-consuming though.