Olivera in the movie is using a black rodiesan LBV
you can tell from the pouch setup and the water resevior at the back. they probably changed the buckles on the front added the umbrella insignia on the strap and back.
keep in mind, they probably removed the big pouches at the back and done anything else to make it look different. you can see the similarities tho =]
looks something like this when you buy it:
http://cgi.ebay.com/ws/eBayISAPI.dll...ayphotohosting