I would like the text of a parody of "The Lovesong of J. Alfred
Prufrock" called "The Lovesong of J. Edgar Hoover". It was published
in the late sixties or early seventies in Mad Magazine or the National
Lampoon, I believe. I remember a line or two: "I grow old, I grow
old/Some whom I sent up for life have been parolled"  and "I should
have been a pair of rugged cuffs/Closing upon the wrists of Eldridge
C."

It was in National Lampoon, 1972
The Love Song of J. Edgar Hoover, By Sean Kelly; Illustration by
Michael Gross
http://www.marksverylarge.com/issues/7208.html

National Lampoon. This Side of Parodies New York: Warner, 1974.
Sophisticated parodies, including "The Polaroid Print of Dorian Gray"
by Michael O'Donoghue and "The Love Song of J. Edgar Hoover" by Sean
Kelly. Students obviously will need to be familiar with the works
being parodied.
http://falcon.jmu.edu/~ramseyil/humorbib.htm

The poem begins with:

We'd better go quietly, you and I.
 When the evening is smeared against the sky
 Like a witness before a House committee;
 We'd better tail each other through the streets
 The undercover beats
 Of stakeout nights and Mafia hotels
 And restaurants that front for Mob cartels:
 Streets that follow like a DA's argument
 Establishing intent
 To overwhelm you with a leading question...
 Oh, let's go and bust a traitor
 We'll pick up the warrants later
 
 The agents call and call again
 Talking of Daniel Berrigan
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&newwindow=1&threadm=5kgru7%24hg8%40news.duke.edu&rnum=2&prev=/groups%3Fnum%3D30%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26newwindow%3D1%26q%3D%2522%2BJ.%2BEdgar%2BHoover%2522%2B%2522sean%2Bkelly%2522%26sa%3DN%26tab%3Dwg

The poem ends with:

I grow old...I grow old...
Some who I sent up for life have been paroled.

Are my agents wearing sideburns? Who dared to say impeach?
I shall give communion breakfasts my Commie-menace speech.
I have heard canaries singing, each to each.

I don't think any more will sing for me.

I have seen them burning draft cards in the park
Burning the files of bureaus and committees,
The wind is black with burning flags and cities.
http://groups.google.com/groups?q=%22+J.+Edgar+Hoover%22+%22sean+kelly%22&hl=en&lr=&ie=UTF-8&oe=UTF-8&newwindow=1&selm=atesta-0709962110020001%40dial43.concom.com&rnum=1

If you can get hold of The National Lampoon Treasury of Humor, it's in
it:
http://www.amazon.com/exec/obidos/tg/detail/-/0671708333/qid=1049594859/sr=1-27/ref=sr_1_27/002-5711873-5123200?v=glance&s=books