Mad Potters ceramic pottery

Wanted vintage Mad Potters ceramic pottery made in Sydney Mines, NS, Canada in the 70's. Most pieces are black, but not always. There are various pieces that are coloured, including figurines, cream and sugar, etc. Examples are Coal Bucket, Miner's Lunch Bucket, Miner with Pick Axe, Fisherman, etc. Most, but not all, pieces have an emblem (usually on the base, sometimes on the back), which is a crossed Pick Axe and Shovel. Also looking for any paperwork, packaging, advertising, etc.