If you find some then just buy enough to get you through this year. Knight will be shipping them in the near future, and the pipe line will fill back up. Unless you get a really good price from someone now.
Have you thought about one of the conversions so you can just use 209's without the discs?? Personally I like the disc in mine. But I laid in a bunch of them last year before they announced their "going out of business". Tom.