In a word "No" I wouldn't just take an EDT and slosh it into a balm base, because I wouldn't know the percentages of oils to alcohol in the EDT, and they might not mix well with my own base. What I can do is make up a balm from scratch with the same or a similar scent structure to your own EDT. So for example, supposing you like an EDT which contains bergamot, lilacs and tobacco, then I could re-create that structure. It probably wouldn't smell exactly the same, but it would be a near miss, so to speak. Sorry, for rambling on, hope this answers your question.