I have a pair of vintage ankle boots from the 60s. They are my absolute favorite pair of shoes. I wear them nearly every day, rain or shine, and the double leather sole is starting to come apart at the edges - its getting kind of bad. I think that this sole was glued, as they weren't anything fancy to begin with. I love these boots so much that I don't want to have to get a new pair, is there anything inexpensive I can do at home to fix them? Some sort of glue or cement maybe?