I believe the Nissan pn is; 39741-17V85 and fits 90-96 Z32 300ZX and the q45 'repair seal' kit is 39741-17V86, can't remember if they are the same but suggest you hit your local dealer to check.
If my notes are correct each kit contains; boot, 2 clamps, snap ring and a tube of grease. Last time I checked retail $59.51, our dealer Z club price $44.63.