No pre-fit barrel maker or broker is going to stock barrels chambered for a wildcat that hasn't been around a long time and proven to be hugely popular - it just wouldn't make sense financially. Suffice to say they'll definitely never do it when you're talking about a quarter-bore wildcat as they have VERY low demand due to limited bullet selection and being flanked on either side by the hugely popular 6mm and 6.5mm caliber cartridges.