Sometimes you can cut a small piece (1/2 inch) off the end of the hose (if you have some excess) and get rid of the hardened/cracked portion closest to the injector. If your return hose is more than a few years old, it could no doubt stand replacing. The dealer sells it by the meter, as previously mentioned. A meter is not quite enough, unless you are really careful when you cut the individual pieces.

And how are your tie rods doing?