NAPA has been going to crap with increasing speed over the last eight years or so. Looks like the MBAs took over and we've been steadily losing parts (and losing options for good quality parts as good brands are replaced by the same garbage available at Davey the Do It Yerselfer type "parts" stores. Looks like this plug tube seal is the latest thing to go away. This place lists them and says "call for price"; donno how current the page is.