Join Date: Mar 2011
Location: San Jose, CA
Bikes: 1980s and 1990s steel: CyclePro, Nishiki, Schwinn, SR, Trek........
You need to provide a WHOLE lot more information to get an answer. You can start with some pictures, and where the bike was made.
Free Spirit was a Sears house brand that they contracted bicycles for from many manufacturers around the world.
If you are going to replace the fork, are you also going to replace the headset? If not, you will have to measure the crown race seat on your current fork to make sure that the replacement is the same size. You will also need to measure the diameter of the stem that goes into the fork to ensure compatibility. And then there is the length of the steerer tube.
Likely it is not possible to get the four dimensions you need to selecting a replacement without taking it apart and doing the measurements. The diameter measurements need to have a resolution of 0.05mm (.002") to ensure you get the correct fork. Steerer length just needs to be equal or longer than current.