@
jhmoore
, don't waste your money on the stock cross bars. They are too low to be used with a Yakima Skybox and even if you were able to get a box on with them, they Flex way too much and you will destroy your roof.
If you plan on getting a full replacement roof rack in the long run but don't want to do it right away, get a universal solution like yakima or thule bars... you can sell these later to just about anyone or move it to a different vehicle. Check out Craigslist and eBay for lightly used options as well.