EL AL has more than 6 economy award tickets available (check on matmid you will see....). AA has access to all of the award seats, however, they have a restriction that they can only book 2 business seats or 4 economy seats at a time. If you put 4 on hold - which they will do for you without a problem - you should be able to start an additional separate reservation to book the additional seats. please report back after you have tried this. (AA agents always say they only see 4 seats available)