Welcome to JA,
My name is John,
You can order a few different remote i would need you model number to get an exact replacement but the most common set is for the Model # XXXXX
http://www.remotes.com/ or 800-remotes (same company) sells the original and a replacement. (here is a link to your remote)
The orginal part # XXXXX
But there are a few universal remotes that would also be excellent remotes for your tv
Here are the best universal remotes that work with Astar
1. Logitech Harmony One
2. Logitech Harmony 550
3. URC Digital R50
4. Monster Cable Home Theater and Lighting Controller 300
5. Sony RM-VL600
6. Philips Pronto TSU9600
They are not cheap universal but they are great remotes and will program to all of the functions of an ASTAR branded television.
Hope this helps,
If you have any questions please ask.