How to correct indent left from large lipoma removal on thigh/quad area? (Photos)

I had a very large lipoma removed from my outer thigh almost 2.5 years ago and still have a very sizeable indent in my leg. I'm incredibly self conscious about this since it can be seen in jeans and tight dresses. The depression has improved slightly over the 2.5 years but don't know if it will ever fully heal and go back to looking normal. I'm wondering if fat grafting is an option or what other treatments are available.