You might be chasing a unicorn. 48-50" are recurve dimensions. Longbows of that length are short-draw bows (paddle bows). String angles are pretty wide at those dimensions, which creates stacking and extra stress on the materials (inducing set). If you want to short-draw, then you're good to go with a longbow design. But if you're drawing somewhere in the 26"+ range, you're going to need a longer bow. Or, make your peace with the recurve.
Where abouts are you packing in Israel? Up in Yehudian NP? Most of what I remember was pretty rocky for stump shooting -- except up north.