Sounds like you are looking for an 8 day bell strike movement? If you are building the case it is better to have the movement in hand before making the case so you can ensure everything will fit. Otherwise you may have to cut clearance holes in the slender waist of your clock for the pendulum bob.
There are a few choices.
1. Buy an antique movement. There are many orphan movements with dials for sale on eBay and other auction sites. It takes time and you will have the additional expense of having it overhauled. But when you are done you will have an heirloom clock that will last.
2. Buy a modern reproduction of an antique style movement. This has the advantage of being ready to go out of the box. An example of a good maker would be David Lindow (https://lindowmachineworks.com/movement-gallery/
) This will also give you an heirloom clock.
3. Buy a modern made movement. There are many suppliers of such things, the best of these are made in Germany. Ronnell Clocks, Merritts, or Butterworth Clocks would be suppliers. However these movements are good for 15 or 20 years then it is more economical to replace them than repair. This approach may be a little less expensive up front but is not historically correct and is my least favorite option.
4. Buy a quartz movement. Inexpensive and accurate. Easily replaced when broken and you don't have to wind them. Don't laugh! I like this option better then 3. above. No doubt some will disagree.