how much for someone to design a site like lolcats?

Where can I buy a script for something like icanhascheezburger.com?

how much would it cost for someone to make a site like this?

I am looking for this script with license or for someone to design something like this for me.

Few thousand dollars I guess... depends on your feature list. Though I think this may just be a crosslink spam post for that link you mentioned.