I don't think very many schools list this breakdown... U Colorado Boulder is the only one I know of which does. Just for the record though, I think the 960 might be a high fluke. In last year's Grad School Shopper, Boulder listed internationals as having a 864 PGRE average and back in 2006 they had a 880 PGRE average. The only places I can think of to look for more information would be the results
section of this forum or at the admissions results
from last year. In each of these, there are some international students who listed their PGRE scores and their admissions results. Sorry I couldn't be more help on this.