If they don't have a copy available already they could pretty easily print one out. Have you tried? They're available on the web, so I've never felt like going through the trouble. If they weren't, I'd ask for it to be mailed to me.

The authority to incorporate contracts of carriage is given by 49 USC 41707 and 14 CFR 253. Once you've bought a ticket from an airline, it is pretty obvious that all of their tickets have the same contract of carriage. It would be hard to argue that there is no notice of the terms given unless someone is a first-time passenger. I really don't have a problem with this.

What I do have a problem with is being bound by fare rules that are not explained or provided at all before purchase. These change for every ticket and they can be quite surprising to pax sometimes in the way they change.