The .219 Wasp is based on Winchester's .219 Zipper which in turn was based on the 30-30 Winchester.
You can buy .219 Wasp brass and dies here: Custom Cartridge Brass and Dies - 219 Donaldson Wasp, 22 PPC, 6mm PPC, 6mm Donaldson Wasp, 7-30 Waters, 30 Herrett, 357 Herrett...Hard to find wildcats...