Yes, they are in the HELP! line of parts from MotorMite, and can be bought at Pep Boys, Auto Zone, or Advance Auto. (I assume for the westerners that Shucks/Kragan also will have them.
Price is all over the map. I've seen the same blister pack priced at $3.99 all the way up to $9.99. Pep Boys used to charge twice what Auto Zone did for this part -- now Pep Boys is cheaper.
To install you have to remove the wiper arms, remove the cowel cover, take out the wiper motor and linkage, pop off the old bushings and pop in the new. There are six bushings in the kit, 3 each of two types. Dunno why -- you only use the three small ones, and I see nothing anywhere on the vehicle that resembles the large ones.
Back of the blister pack says it fits 97 - 2000 XJ but it worked fine in my '88 MJ.