Are there travel agents in Santiago, Chile who operate 1-2 day tours to Antarctica?

I am looking for info/guidance on Antarctica tours from Chile (either Santiago or the Patagonia peninsula)

no tours from there sorry

only authorized military or scientific personnel can travel to Antarctica.
probably you won't find anyone that will take you there.

Lindblad and other cruise companies offer tours there. I don't think you can just go there independently. They, of course, are more than 1 or 2 days, and very pricey.

A quick check of the Internet shows that tours appear to be at least 7 days. I don't think it's possible to make the trip in the time frame you're considering with civilian transport.