Go onto eBay or visit a hoby store another idea is to go to a website on how to build a flash light
I too have a small circuit with me used to make a small led flash lamp. I can send it to you if you need. You can send your request to me at dkh.hyd@gmail.com
I'll also try to post a direct link to you soon.
... you don't need a drawn circuit diagram. It is so simple it may be stored in your head.
A simple flashlight is a cell or battery in series with a bulb and a switch.
If at all you are looking for more hobby projects, download these hobby projects http://www.adeekshith.tk/2011/02/electronics-for-you-projects-download.HTML
There are above 300 of them.