In a nice bit of synchronicity, I had just been contemplating goose, having had it in cassoulet, but never having had it on its own, in classic, roasted, Dickens Christmas Carol fashion.
I found a site that raises and sells lovely, free-range geese, goose eggs, and "fatty liver" (i.e., foie that has become gras without force feeding). I emailed them and asked where their products could be purchased, and while the fatty livers have to be purchase from their website, just about every store in Chicagoland either carries or can order their geese (I haven't checked it out yet, to see who might have them on hand).
Here's their web address: http://www.roastgoose.com/
The company is called Schiltz (not a typo -- the "l" follows the "i"). Here is the email I got from them today as to where we could get their geese.
You should be able to find our frozen whole geese locally, below is a list of retailers for Illinois. As for the liver, currently it is only available through our website or by calling the toll-free number listed below. To Illinois we can use UPS Ground shipping and still get products to you in 2 days, so shipping to your area is relatively inexpensive.
Butera Finer Foods
Treasure Island Foods