There were two kits, 7538 and 9814 that comprised the 13 bars. I don't know if this is a fair price or not but it's a benchmark, http://bbqparts.com/genesis1000.html$60 for an aftermarket stainless steel set. Hopefully you'd be one-and-done with these.
Jack, OEM isn't always the best route. There's a guy on Ebay named RCPlanebuyer who makes custom bars that are better than OEM and cheaper. He's my go to guy whenever I need to replace flavorizer bars.