Originally Posted by
zeltergiset
You can use ITA matrix to search for the booking code you want (advanced routing code: "/ f bc=j" for J class, for example), then use the handy browser script called
ITA Matrix Powertools to book the ITA output via aa.com.
Very clever bit of hacking

.
The AA site didn't seem to like the links it generates

. But this seems to be because the N fare class ITA thinks is available isn't showing in a manual search on BA or AA. If I copy / paste / edit the generated URL to an available class (eg V)it works rather well. Deffo one to squirrel away for future use ^^^.