Finally got off my a** and put in my complaint.
Your Complaint Information is successfully submitted.
Your Confirmation number (ODI Number) is: 10118612

However, for what it is worth, I told my dealer service guy about this effort of ours and he stated that it was futile as since it is not strictly a "safety" issue, Isuzu won't have to do anything about it. It was intereting that he was aware that window failure was ubiquitous on the Vehicross though...