Hi April. There's a remote on ebay for $18 ("sale ends in 1 day" - then it will be $23) **broken link removed**
Alternately you can try all the universal remote smartphone apps with an IR Blaster (which I believe is just two parallel [opposite polarity] IR LEDs connected to the left [or both] channel of a headphone plug).
If you don't mind using your PC/laptop to control the TV, you can have a look at LIRC (linux infrared remote controller - I believe there are versions for windows too).