Why don't you just walk into a freaking Suit Supply store and get a nice staple suit instead of all this thrifting? Just give it a thought and try it for a change. Stop with this thrifting and trying to force yourself into them. Just try it. (Remember, I was in denial about my suit size and held onto 38R like a Korean to his kimchi).
Of course you can find some great stuff thrifting, but you can also spend an awful lot of time and money looking for it. When you take into account petrol costs, purchase price, alterations and time spent looking for & experimenting with differant thrifted bits and pieces. You could easily spend $400 over the course of a year doing all of this.... Sometimes it's better to just bite the bullet and go and buy a new suit.