Many many sets of XJ leaves have been changed in driveways with hand tools over the years. It's only a couple dozen bolts, but 20 years of age can certainly up the challenge of removing the old bolts in locals that suffer winter roadsalt rust.
No rust could mean an easy afternoon job, or bad rust make it an all weekend ordeal with you wishing you'd spent the $178.
Your cart assumes you'll be able to reuse the eye bushing bolts, which depends on whether the old ones are seized in the bushing sleeves or not.
Check your snubbers the next time you walk by, they may be due for replacement too. ...if you can get the old ones off without breaking the bolts.