Agree with your last post @carolina_yankee. I would just buy a really good (used) tux now and have it tailored. Before our crossing in May, I had to visit the tailor to have jackets and trousers let out a bit. I was reminded the human body does change over time and in choosing quality garments, they can (within reason) be easily adjusted. Fwiw, my DH swears by Jos Banks, but regardless of our different strategies, we don't look too much like the sartorial odd couple.