You are unlikely to find parts for these.

This article will explain why and is interesting in its own right.

https://antiquevintageclock.com/2016/12/17/why-my-two-daniel-dakota-clocks-are-some-of-my-favorites/

You appear to have a few options:

Find one to cannibalise and maybe learn about clock repair a little as well.
Find one with which to replace it
Replace the movement with a modern quartz one (maybe opting for radio controlled as well.)

Shhshh
December 2018