I have a set of. I have a set of Sharper Image Wireless Speakers (Sharper Image Wireless 900MHz

Question

I have a set of Sharper Image Wireless Speakers (Sharper Image Wireless 900MHz Outdoor Stereo Speakers (SR277)). My transmitter stopped working today, all of a sudden it was no longer sending a signal, the power light is on, but the signal light dead. Sharper Image is in bankruptcy so I can't get a spare part from them. Is there any other product I could substitute OR a way to fix it?Rebekah Duncan