I had installed a rebuilt rack on my 95 940 about three years ago. As is usually the case, they used cheapie boots which eventually split in the oil and cold and failed. The usual drill is to remove the tie rod end (always corroded in place), replace the boot, and unless you are VERY careful realign the front end at a cost of $100 or so.
Along comes Products That Work in Australia with the Rakboot, a stretchy urethane boot that stretches right over the tie rod end. It comes with a protective sleeve that you coat with oil, then push the new boot on. Zip tie it in place and you are good to go. It took me all of about 45 minutes to do the job. They cost $25 plus about $25 in air shipping from http://www.productsthatwork.com.au/ and took about a week to get here.
We'll see how long they last but they look very robust. The OEM Volvo boot is as usual very robust but will run you around $20 each and requires removing the tie rod end.
--
See the 700/900 "FAQ" at the menu bar top screen left side.