Check out Alpha-Stim. This is a non medication, non invasive treatment for insomnia. Depending on your country it may or may not be covered by insurance. And the price can vary. But it's worth every dollar.

In the meantime have you tried the 4 count breathing technique? I rarely have insomnia but this works like a charm for me. I sometimes don't even get through the complete 4th cycle before I'm asleep.