Let me know if you find somewhere else. Im ok with waiting till April for them, but always interested in good alternatives. Ive seen a couple on ebay, but have no idea of quality.
Also Im running an Xforce system from the Y pipe back, that sounds really good, even with the stock headers, woill sound so much better with headers and high flow cats.
The Skid Factory on YT have a vid where Al shows the inside of the stock headers, more restrictive then they look from the outside.