Woodland Scenics has a complete landscape kit. Maybe that is what you are looking for? Sorry for my below average computer skills. I tried to insert a link, but I don't think I got it right;
https://woodlandscenics.woodla...s.com/show/item/S926
You might also try to find a kalmbach book called Scenery for Model Railroads by Bill McClanahan. It is mostly geared to HO and N scale, but most of the material will apply to our scale as well.