You're car does not have a steering rack
oh, you mean the center link where it bolts to the pitman arm and idler arm. Did you replace the center link? I'd have guessed the seal for the pitman arm would have came with it. I'd have to look, I thought the idler arm had a boot too, but maybe the older ones differ. I know there are some minor variations of front end parts over the years.
Anyhoo, check your local parts store they may have a line on what you want. I know they have replacement boots in the catalogs.