So I said "what the hell" and found out the email address of the guy who donated those dozen Ascot Chang shirts that fit me perfectly. Two days ago sent him a friendly (but carefully written email) saying that if had more shirts, jackets, or shirts that he was planning to donate, please let me know and I'd buy them from him. I told my wife what I'd done and she was Not Too Pleased. (Made a note of that for the future.) This morning I got a short but friendly reply back from the guy: "Hi - yes - funny email. I will keep your information and let you know if anything comes up. Happy Holidays."
Nataku, thanks for the encouragement. I didn't score an armful of Isaias but nothing embarrassing happened, either. I did get some satisfaction telling my wife, "Hey, I got a nice reply from that guy who donated the shirts", and hearing her shout "NO WAY!"