Wanted to buy: 1 really nice mature, aged riesling

[newsguy]

for a farewell dinner with a good friend before she moves away, i need one bottle of a really nice aged, mature riesling. it's her favorite varietal, but she's never had a mature one. this will likely be drank and savored without food. kabinett or spatlese style, no sweeter please. i'm thinking $50ish, but am a little flexible there. what i can't be flexible about is i'd need this bottle in my hand by the end of the week. if u can help, please e-mail me: keithrstclair at yahoo dot com nospam please. thanks in advance!