The Portamento patches are fine for certain things, but pitch bend is not really a substitute for anything. It will sound pretty dreadful, IMO. There are limitations with sample libraries that just have to be accepted, I'm afraid. One of them is that French overslide doesn't exist, and the other one is that Portamento hasn't been recorded with a bow change at the top.
Having said that, your example is just a simple slurred portamento, so that's easy.
DG