Where can I get a speaker for my inexpensive grandfather clock?

My clock no longer chimes. It is a Westminster chime (2 D size batteries and 1 AA battery)movement hourly toll with an automatic night shut off.. I bought the clock from Walmart over 5 years ago for about $129.00.Made in China. About 80 inches tall. On the outside of the packaged box is written GF0090C-80 (if that means anything). Thanks