They aren't making them anymore................yet. I know someone was looking into having some new ones made. The muffler company wanted a minimum order of something like 7500 mufflers before they'd make a run otherwise it wasn't cost effective for them. Problem is, they only made 4005 169's.
And we all know some of those are in cubby heaven. IIRC, the price was gonna be well over $100 each as well.