Looking for Pigs in Space posters

[rlally]

Hello,

I have been trying to find any of the Pigs In Space posters - does anyone know where I might be able to purchase them? I've looked all over ebay (inlcluding the uk version), as well as hours spent scouring the web for them...any ideas? One of them is listed on this web site under Muppet Collectibles, but no indication of how to obtain it.

thanks for your help!