Hello,
I am sure this data is out there, but just dont have time to find it. 
I am looking for the following demographics broken down into a single
excel file.  I am willing to pay the price quoted for the info
provided that the researcher quotes the source and explains how I can
repeat their steps in the future.  I am looking for all
zip codes in Texas.

The columns on the excel file should be:

1 State
2 Metropolitan statistical area 
3 City
4 County
5 Zip Code (5 digit)
6 Median Age
7 Median Income
8 Median House Hold Size
9 Median Educational Level

That's it - 9 columns of data and one zillion rows (well 64,000 is
your excel limit)!  If you cannot email me the data, then I guess you
can post it via copy paste using csv.

Let me know if you have any questions.

Cheers,
Curious