I was in the same boat. Going to eventually get a frontrunner or rhino rack but wanted to get my awning on and did not have OEM cross bars. I was trying to figure out how to spend as little as possible until I got the aftermarket rack. I looked at Eezi-Awn G-Clamp at $80 that would attach it to the stock side rails, or getting OEM rails for $100-$125 (eBay or fourm sale), with brackets (another $25-$50) and drilling, but I ended up using some Yakima crossbars I had and spending $200 on new Yakima grab towers. I did this because the Yakima components can be used on another vehicle or if I decided to sell they they have good residual eBay value, recouping a good bit of the cost. The mounts were made from hardware store stuff for $8 ea. (all available at Lowe's etc.) and are very strong internal compression mounts for a real clean look. Just my experience, starting from where you are.