I'd like to know which, if any, oil companies currently purchase their
oil from other than middle eastern sources so that I can buy gas for
my cars at service stations that aren't supporting middle east
suppliers.

Betsy,

The very best online source I've found for this information is a site
called "Boycott Middle East Oil," which has collected and analuzed a
large amount of data obtained from the US Department of Energy. The
brands of gasoline preferred by the site are these:

Citgo
Conoco
Phillips 66
Sunoco
Coaster 
Flying J
Sinclair
Vitol
Union 76
Tesoro 
Wal-Mart
Hess

http://www.boycott-middle-east-oil.com/

The site has produced graphs which indicate the relative amounts of
oil imported from the Middle East by all the major gasoline companies.
New statistical data will be posted on February 24. Here is the most
recent graph:

http://www.boycott-middle-east-oil.com/images/november_2002_large.gif

The Energy Information Administration of the United States Department
of Energy is a useful source of data on the importing of foreign oil
(NOTE: many of the EIA files are in .xls format; you will need to have
Excel or an Excel reader in order to access these files.)

Energy Information Administration
http://www.eia.doe.gov/oil_gas/petroleum/data_publications/company_level_imports/cli.html

Before making the decision to change your gasoline buying habits, you
may want to read these articles, which debunk the concept of
boycotting Middle East oil:

Snopes.com
http://www.snopes.com/inboxer/outrage/nogas.htm

Christian Science Monitor
http://www.csmonitor.com/2002/1104/p15s01-wmgn.htm

Search terms used (in varying combinations) in finding this data:

"oil"
"gas"
"companies"
"middle east"
"import"
"imported"
"boycott"
"department of energy"

I hope the information I've provided is helpful. If anything that I
have said is unclear or incomplete, or if any of the links do not
function, please request clarification before rating my answer, and
I'll be glad to offer further assistance.

Best wishes,
pinkfreud

If you would have called your local library they would have told you
to visit www.eia.doe.gov/neic/experts/contactexperts.htm.

This would have been free and you would have known it was coming from
a qualified librarian.