Hello Yvonne,
If you only need the foot control you can buy a YDK control and wire it in very easily, if you need the control and lead the make is probably YDK and what you need to do is draw a picture of the plug in the machine to make sure you get the right one, most sewing machine shops will have that in stock or go to www.sewingonline.co.uk/manuals
Ken
drivewithken@blueyonder.co.uk, February 2009