well, if you pipe find /usr/share/$manfolder (not a real variable) into grep $1 (or something like that,) it should give you a pretty good idea whether you have the man page or not. i've thought of three ways to do it (some of them could be silly) while typing this, i chose the one easiest to explain in few words.
since i don't have a single man page on tc that i know of, i don't need that feature anyway, i can simply have man load the online version, but i don't deny it's a fun idea. you could even wget the file to /tmp, load into html2text (i'm more likely to have that than netrik) and pipe into less.