I know you are taking it internally, but to get your lips to produce more may be a serious challenge.
Interesting bits in that article about transdermal carriers (oleic acid in emu oil is supposedly one of them), and injecting collagen producing fibroblasts.
I still prefer to be a guinea pig for emu oil before I recommend others try it, but be my guest if it intrigues you (and you're not vegan) -- I found it for $45 for 8 oz so I can really give it the same chance I gave calendula and coconut oil.