I find it interesting that almost everyone is suggesting chemical means in order to overcome a side effect of chemical withdrawal. Dependence, whether psychological or physical, on another chemical isn't what you're needing. Instead, try some of the following:
Take a Warm Bath
Get a Massage
Listen to Music
Drink Warm Milk
Drink Herb Tea
Eat a Bedtime Snack
Avoid Caffeine, Alcohol and Tobacco
Sleep in a Well-Ventilated Room
Sleep on a Good Firm Bed
Sleep on Your Back
Get Some Physical Exercise During the Day
Keep Regular Bedtime Hours
If You Can't Sleep, Get Up
Don't Sleep In
Get Up Earlier in the Morning
Keep Your Bed a Place for Sleep
Avoid Naps
Avoid Illuminated Bedroom Clocks
The justifications for these suggestions are found on
http://www.well.com/~mick/insomnia/
Hang in there, Mully, don't use the insomnia as an excuse to start drinking again. What you're doing is beneficial to you in many ways. Nobody ever said it was easy; besides what are a few sleepless nights as compared to a longer, happier and healthier life? Good luck, friend!