Here is an audio clip from Savage's radio show out of KERN AM 1410 in Kern County, CA on January 17th.
One commercial segment with Stamps.com, GEICO and Wyeth (Chapstick) all advertising.
If you're calling those corporations and they say they aren't advertising, you can play them this audio clip.
UPDATE: GEICO is not telling you the truth if they tell you their ads are not running on Savage. Call the president's office at 800-824-7795