If it is strung EADGC, why not?
Just joking, the best way is to ask Jason from Hipshotproducts.com, he is a very helpful guy. Or you can do what I did:
Find the Xtender model that will fit your Bongo (I don't know if there is a direct replacement one), download a picture, scale the picture to 1:1 (I mean measure for example the distance between the two screw holes, have print out and scale it making it bigger or smaller accordingly). Put this 1:1 scaled picture in your bass and check if it will fit. But my senses tell that the arm of Xtender will probably touch the tuner of B string when you drop E.