I use to have a fancy roof rack custom for rods on my old truck (sold it with the truck), it was nice and it looked good but...IMO a good ski rack works even better and is just as secure and it is lockable. I now use a Thule ski rack for rods in the summer and skis in the winter. The rack is not expensive and can mount on YOUR roof rack, (You don't need their bars) They have adapters for nearly every factory rack. I have a couple different trucks and 1 rack (two sets of adapters).
A ski outlet will have one for under 100 bucks that fits your rack.
If you are really hooked on getting a "rod" rack click here:
http://www.thesurfcaster.com/surf%20pdfs/rodacc.pdf
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