The joysticks, buttons, etc from: http://www.happcontrols.com/

Then you need the card to wire all the buttons and joysticks together-- The IPac lets you wire all the buttons/joysticks into one board that plugs directly into any PC via a USB port. We are using a Raspberry Pi. They are cheap and easy to set up.

You can get the software that you'll need to emulate the old arcade games on your computer at: http://www.mame.net the arcade games themselves that run through the mame emulator are called Roms and can be found at a lot of different sites online by doing a google search for MAME Roms. We are using a micro SD card for to sore the games.