Here is an even easier way to find and call your representative (with a handy script concerning the amendment): http://defundthensa.com/
That site's script is also, say, twice as long as it needs to be. All you need to say is "Amash amendment" and "HR 2397", and add a personal note. I'm not even sure mentioning the Nugent amendment is a good idea, especially since the tally taker might miss-remember your call and place a mark on it or both.
Hmmm, it just occurred to me that a fixed script on a web site like that is silly. They ought to be generating a large number of different ones....