I know this is an old thread, but wanted to post if anyone comes across it via a search.
I had a leak on my return line (#11 is correct) at the reservoir and replaced the hose. You can order the hose from someone that sells OEM - got mine at Carquest. Make sure you get new crush washers for the banjo bolt and new hose clamps. The hose is secured to the frame rail under the airbox so you'll need to remove the MAF and airbox as part of the job (straight forward enough).
If you are going to do this job, replace #7 while you are in there. The "part" is another $30 or so but it is nothing special. Just pick up a matching length of hose at your local auto parts store for a few bucks.