Hey Tyler! I checked the cross reference and couldn’t find anything for the CV boots. Hopefully, a Kent owner will chime in here. You may have to remove it, take some measurements and find a parts house that’s willing to do a little research. Remember most Cortez parts were original parts for something else, so you should be able to find a match. (might even start with the Olds Toronado).
Sorry I couldn’t be more help!