so i couldn't get ahold of them at that number but i found a site : http://www.autopartswarehouse.com/
they have a live chat and the guy was so helpful, i asked him this same question and he looked it all up and unfortunately he said that
"The dimensions of the differential carrier housing of suzuki suzuki vitara is different from 2003 Chevrolet Tracker"
but he knew i wasnt buying anything from them and still spent a bunch of time looking it up for me and doing part searches etc..