Looking to buy Older Bordeaux, Burg or Riesling (1940s and Older) - Preferably Single Bottles

Let me know what you have and what you are looking for (purchase, trade, etc) Don’t need a ton, just some older stuff for several dinners in the works this year.

Any Bordeaux

1er and Grand Cru Burgs (Or quality equivalent if pre 1937)

Quality German Riesling producers

Has to be 1940s or older. Thanks!