For those who see this old thread because they are in the same situation......the foot pedals for the
322s are no longer made (as of this writing). So, you have to search for a used one by calling
all the Singer Sewing Centers (singerco.com has the listings) until you find one, ebay, or if you know someone with electrical knowledge, there are powercords, also called lead cords, that fit the plug but don't have the foot control attached. That's were the person with the electrical knowledge comes in. I just ordered a powercord through amazon.
http://www.amazon.com/Lead-Power-Cor..._se_p_t_3_1HEN It is called a
Lead Power Cord
#979430-002 (just in case that link eventually expires) and is being sold by SewingMachinesPlus. It fits and the machine will turn on and run at both speeds but I haven't tried to have it wired to foot pedal yet because we found the actual foot pedal from a Singer Center and they are mailing it to me. Other cords made for printers and various electornic devices look like they would fit but the wattage/amperage/etcs. are of concern. I hope the weeks of hunting for a replacement by two people (thank you R!) helps someone else.