Yeah I've used a lot of crap but the key has just been to keep them moist and not peel. So yes I believe Vaseline or Aquaphor could do the trick.
You think your lips are almost done peeling? Since when? I'm surprised your not happier about it. Do you think it's because of the Plaquenil? If not what's helping?
Also didnt you say that parts of your lips are completely healed? That your affected area has gotten smaller? That's huge, I'm surprised you don't talk more about it.