Depending on your location, you may find both "craft' leather workers and saddlers / horse hostlers within reasonable reach.

The items you need made are not particularly complicated, but like any specialized product, they require a set of skills and equipment to produce.

In a similar vein: You are unlikely to ask your local carpenter to whittle up a new set of wood for a No4, but someone who makes and restores antique furniture may have just the skills and tools for the job, if your wallet can handle it.