I had to call to arrange to keep Peachtree when it was removed from Adventure a few months ago. At the time I was subscribed to Crave+Movies+HBO with Encore, for $22 a month, and I had to get the Superstations theme pack to keep getting Peachtree.
I just looked up the channels included in HBO+Crave+Movies and there are some superstations: KTLA, WGN, PIX, my38. The Superstations theme pack includes those four, plus my9 and Peachtree. So you could try to swap your theme packs around, or get Superstations theme pack at $7, or Peachtree as an individual channel at $4, if you can live without my9 (WWOR-TV).