Hi there I have recently aquired a 12 bore redding model 16 (round charge bar) and I only have 1 each of bushings, a no 20 powder and a 1 1/16oz shot. Redding don't have any as it's 30 -40 yrs old. Does anyone out there know of any that are available or how to make them (they are not straightforward to make like mec or hornady ones)?