There's no new release of JBoss AS 7. The last one is JBoss AS 7.2.0, which you'll have to build yourself (gist:5123808).
The next version is WildFly 8 (http://www.wildfly.org).
If you want to try JBoss EAP, I think that there's a dev license that allows you to show it to your customer. I'll just have to pay the subscription when going into production. (to be confirmed by some RedHat guys)
If the dev license doesn't fit you need, you may build JBoss EAP yourself. It's open source, so you can download the source code and compile it. See hasalex/eap-build · GitHub.
OK, thanks for the reply.