GoGo, if you are adventurous in the least, you could probably replace it yourself. Bigger craft stores like Micheals has these plastic boxes. We have gutted retro electric clocks and placed a battery device with good success.
Locally I would suggest Russells in the junction as the first place to go. Celeste is their strongest advocate here on the blog. I havent’ used them but I know they are nice folks and if they can’t do it they will know where to send you.