The PB-4 body is quite similar in shape as the Telebass from the 70's unless you want the earlier look with no comfortable shaping. Also if one would wanna add for example binding on it then the flat top would serve it better. But yes - one could build a Tele looking instrument with PB-4 if everything but neck pocket routing was left out. Have to think about this. DB would probably know how similar the two bodies are or could the PB-4 body be used as is for Telebass kit in the future with just routing and cotrols modified.
At the moment there are just necks and fretboards on PBG shop and no bodies. Some PBG blank bodies would be fun as they would give a chance to do modified but still PBG builds.
Or the blank option for each kit to choose from. Could be for the same price or bit less and without pickup/controls routing and all hardware - the person who wants to modify multiple things in a build is likely gonna upgrade the parts too and now that the hardware selection is bigger this could go hand in hand. For a person like me this would be a tempting option for I have no facilities or any chance of making a scratch build.
Also one basic bolt-on bass neck could be a useful addition to use as a source for a replacement neck.
Just a few thoughts of mine to bounce around.