You could use general collective nouns that fit the context, such as:
* A team of shoemakers
* A group of shoemakers
* A guild of shoemakers (if they are part of a formal organization)
* A company of shoemakers (if they work together in a business)
If you're looking for something more creative, you could come up with your own collective noun, like:
* A stitch of shoemakers
* A sole of shoemakers
* A cobbler's crew
Ultimately, the best collective noun will depend on the specific situation and what you want to convey.