Hey Joe, here's the link to the cover you'll want to use for your Pro 780: https://www.homedepot.com/p/Traeger-Pro-780-Full-Length-Pellet-Grill-and-Smoker-Cover-BAC504/307856414
Jerry this is just the cover to protect from elements. If you're looking for the blanket to use during a smoke, you'll find it here.. https://www.traegergrills.com/shop/accessories/grill-insulation-blanket-34-series
Yes we have one as well
For Home Depot Model Eastwood 34, or other 34" Traegers. Texas 34, Texas Elite 35, Pro 34. Will NOT fit the Select Elite/Pro, XT or Pink Pig. Will NOT fit the 20" models - Jr, Tailgater or Bronson. Will not fit the 22" models , Lil Tex, Lil Tex Elite, or Pro 22.