I haven't seen the newest ones, with the exception of the Ransom Alphabet, and the string bow, available anywhere yet. The 2 aforementioned I have spotted online--do a google and they'll turn up, or visit
www.creativexpress.com (ProvoCraft's online retail outfit)
As for "cheap", well, I've seen them at various online retailers for a discount, and if you google "Discount Coluzzle", I'm sure they'll turn up.
Whatever I've seen on Provo's corporate site, with regards to new products, I've learned that it's typically months and months before they ever become available retail. :( This annoys me no end, as I prefer being able to buy something immediately when I see it, rather than waiting, hunting, etc.