Check if they are in the public domain (no longer under copyright), and if so you may be able to make nice color copies if the library has that ability.

It's not vintage, but there it is: http://art.cafepress.com/item/food-is-a-weapon-small-poster/58182265

This one IS vintage: http://www.ioffer.com/i/15187379

I couldn't find reprints of the second poster, but there are several copies of the original. Most seem to be selling for at least $500, but this one is listed for quite a bit less.

http://www.vintagepostcards.com/mm5/merchant.mvc?Screen=PROD&Store_Code=VPC&Product_Code=MILIWO1-P7718&Category_Code=MILIWO1

-OneWallGoogler ;)

Folks, WPA posters were paid for out of your tax dollars. (Metaphorically yours, at least.) They are government documents and thus all in the public domain. Do not believe the corporations when they tell you they own everything.

McGill Univerity has a large collection of vintage Canadian War posters (you can browse by subject), and they have an order form on their site (reprints are smaller, around 12" x 18" I think). They also link to other sites: http://digital.library.mcgill.ca/warposters/english/links.htm

http://www.library.northwestern.edu/otcgi/digilib/llscgi60.exe?mode=or&query=food&REGION=&SIZE=20&db=2

$10 for the Eat more corn...poster
http://estore.archives.gov/ProductInfo.aspx?productid=N-06-6041

The bottom one, "Eat Fruit, Be Healthy" was produced by the WPA in the thirties. There's a Library of Congress site that has this and many other WPA images:

http://memory.loc.gov/ammem/wpaposters/wpahome.html

There is a link "How to Order Photographic Reproductions" that gives sketchy info about ordering by no prices.

"Renata sent us a website where all of these posters are displayed." Where would that be? or did I just miss it?

Some of the best of the wartime food genre, in my opinion, were those produced in Britain. They have some for sale at the Imperial War Museum shop online:
http://www.iwmshop.org.uk/

This is for anyone in the DC Metro area. There is a cool vintage poster shop in Old Town Alexandria. It's on King and I think it's around the corner from 5 guys.

For those of us on a budget - here are some for $15-$45 including that gorgeous Eat Fruit, Be Healthy print.

http://vintagraph.com/index.php?showimage=62

They have lots from WWII, Health and Safety, I love those vintage prints that tell us to keep our mouth shut and love the government!

You might want to keep an eye on Swann Auction Galleries' poster sales. They sell a lot of really high-end posters, but they're not all super-expensive.

http://www.swanngalleries.com/pos_ters.cgi

Also, if you've seen Nicho Lowry on Antiques Roadshow, he's really cute. So you should go bid on them in person if you're in NYC.

for new prints: http://www.posterrevolution.com/gallery/item.cfm?ID=635073

Vintage posters are fabulous holidays gifts -whether they are for the kitchen, the living room, the bedroom - even the bathroom! We have loads of them (at all price points) and ship all over the world... our website is www.laffichiste.com and we look forward to answering your questions and finding the perfect poster for you.