I got some pcs of the LED Front light for my game boys series and changed the back light into a front light, it was a great job.
you can get the front lights here and DIY your game boys.It's too much fun.
The online store is http://www.aliexpress.com/store/406029
You can also get some guides from the videos there. Cheers!
I would like to post my DIY Game boys here,how can I attach pictures?