I used to know where in Derby to go for anything like this, but whilst I wasn’t paying attention it’s gone all coffee bar and trendy. Ashbourne is going the same way regrettably.
There used to be an iron mongers by the old cattle market - oh, but that’s the old one that was replaced by the new one that’s been replaced by expensive car showrooms.
There’s a “ Country Store” ( read farm supplies) on the Tutbury to the bottom of Draycott in the Clay road - past the Gypsum mine that’s famous for the biggest non- nuclear explosion ever. Maybe they still do nails by the pound?