wrote:
> Hi,
>
> I'm just wondering if anyone knows where I can buy (I live in the
> Portland Metro area of Oregon) or order (online, etc.) Sen Yai noodles
> (wide rice noodles).
>
Just about any large supermarket, and certainly any Asian market. They
may not be labeled sen yai but they are the same thing under various
names. -aem

From http://www.foodsubs.com/NoodlesRice.html:

Thai flat rice sticks = Mekong rice stick = ban pho (Vietnamese) = banh
pho (Vietnamese) = ho fun (Chinese) = hor fun (Chinese) = haw fun
(Chinese) = lai fen (Chinese) = laifen (Chinese) = sen lek (Thai) =
kway teow (Malaysian) = kway tio (Malaysian) = gway tio (Malaysian) =
kui teow (Malaysian) = kuey teow (Malaysian) Notes: These rice
noodles are especially popular in Southeast Asia. They come in
different widths; the thinner ones are best for soups, the wider ones
for stir-fries. Before using, rice sticks should be soaked in hot
water until they're soft and transparent. They can then be used in
soups, or add along with some broth to stir-fries. Substitutes: wide
rice noodles OR rice vermicelli OR fettuccine OR bean threads OR somen