Recently Matt Cutts in his video blog showed a backpack of brand
jansport. He also referred to the possibility of the exact bag being
used in the "lost" by sawyer. Video blog of Matt Cutts -
http://video.google.com/videoplay?docid=4648779681675044189&q=SES+matt+cutts&hl=en

I would like to know the exact model and the availability of the bag
that is showed by Matt Cutts with price and the website/phone number
from whom this bag is available.

I would not take assumptions for an answer. Please be accurate if you
are providing an answer. Although this is a low priced question, i
believe the question itself is not all that complex. I would add a tip
if answered to my expectations. Thanks.

This appears to be the one:
  
http://cgi.ebay.ca/RARE-LEATHER-JANSPORT-BACKPACK-AS-SEEN-ON-ABCS-LOST-EC_W0QQitemZ220010332323QQihZ012QQcategoryZ16081QQcmdZViewItem