We have a button for "new posts" so most of us read all the posts that are new, no matter what forum they are in. There is no need to double or triple post.
I think you will find it difficult to find someone in an open forum like this to purchase a case of beer and ship it to you, since they don't know you. That's probably why you haven't received any offers.
Landhoney had a good suggestion, though. They might have more commercial beers swaps.
Or, maybe instead of posting "Who can I get to send me a case?", you could suggest a swap of your own. Like, "I can get a case of ____________ beer here that you might not be able to find in your area. I'd love to swap a case of that for a case of Spotted Cow". Just a thought.