Back in the early, early days, we'd get supplied with additional barrel lengths primarily 10" and 16". Today we make our barrels from 36" barrel sytock in the three most popular lengths. We can do other than standard barrel lengths but in most cases, each will be done by hand which will add to the time and expense of the gun. If there was demand for a different length barrel, we would certainly entertain running a quantity lot.
Banjoman