go to your saab dealer, they have them for pretty cheap.
jack up the car, take off the wheel, you will need a second jack for this:
place it under the control arm and lift it until the bolts of the sway bar link seem to be parallel to eachother (or perpendicular to the sway bar link)
unscrew the bolts - it will be tough to unscrew them... u need a wrench for the nut, and another one to hold the 'screw' of the link, right behind the nut.
replace the link, and when you screw back the nuts, make sure not to twist the 'screw' of the link...drop the jack, put the wheel back, and drop the second jack and you are done.
it'll take about 1 hour if you take your time...
all you need are a couple of wrenches... you will need some of 17, 18, 19 metric size i believe.. they are cheap at autozone.
another way to do it if you don't have the 2nd jack, is to place the wheel or a block right under the control arm, and slowly lower the car, but that is not as safe, i think.