Interact PC Propad 6. Actually it's the same product line, as the Quickjoy Amiga Hyperpad.
Like a SNES Pad with optional Turbo on any button, but without Start/Select.
The 6 is important, meaning 6 different buttons. There is a 4 version, which has Shoulder buttons, but there they are optional alternatives to two regular buttons. Strange.
The D-Pad is very precise.
Propably you need an USB - Gameport Adapter, if your PC is any new... Make sure, it's an active one. Pad and adapter are cheap at Ebay.