you have to measure the belts, and order them separately.
with a caliper, measure in mm...height, width and length...of each belt http://www.ceitron.com/passive/sqSbelt.html
you will need to disassemble the machine to install them.
Otherwise have a tech do it for you...$$$
but since the machine is obsolete, you can repair it, but is it really worth all the effort???