Googling M-M turned pin header should find them. Narrowing the search down to ones compatible with specific sizes of DIP socket is more difficult, however long SIL strips of M-M turned pins are readily available and can be cut to length as required.
N.B. the SIL strips usually require an assembly jig to keep them vertical on both sides of a DIL footprint during hand-soldering.
The board-edge pins T3sl4co1l suggested are vastly superior as you can get ones that are thin and flat enough not to distort a leaf contact DIP socket, and they are also notably more robust as their pins can be straightened if bent, whereas turned pin headers have a nasty tendency to fracture at the base of the thin section of the exposed pin if abused.