I saw a thread on the Mexican boards that USSF is selling more tickets, so I did a search. Found best seats in the house (5 rows up at half-way stripe) at half-way stripe for $125. Hopefully a ticket-less US fan can buy now.
depending on which side of the field those seats were on, keep in mind that they may be partially obstructed view if they're behind the benches. as for your seats, nancyb, i'd think 15-20 rows up at that location are as good as it gets for watching the game in terms of being close but providing a little perspective. you are set! now enjoy!