I visited that site via Firefox on my desktop computer, and it is indeed royally screwed up. It seems to be in an endless loop trying to refresh itself and reload something. Pretty much unusable.
I hammered away clicking on things, trying to catch it between the interruptions, and managed to find a link to this site for their products:
https://www.showmetheparts.com/trw/, which does show a few parts for AMC Eagles. Unfortunately, it only lists a few brake and suspension parts; nothing for the clutch.
I don't have much hope that you'll get a reply to your inquiry. If their web site is that wacko and they haven't done anything about it, there probably isn't anyone from IT reading the mail, either.
I'm going to stop piggybacking on your post and start a new one regarding the whole clutch master cylinder problem. Maybe we'll flush out some new solutions or possibilities.
I've had to quit driving my Eagle because of the flaky clutch. It has abandoned me far from home twice now, and I'm too old to deal with that crap.
JB