Wow, I thought this would've died after the question was answered.
And if anyone cares: the staff at the theatre was pretty useless in regards to getting my note & Playbill back there. I was finally directed to the house manager, who took the note & Playbill and said he'd pass it on to the right person. Of course after the show, nobody knew anything, so I gave up. I just hope she at least got & read my note, and appreciated my kind words.
-- SDG