I should have noticed the "US$" as a hint that you weren't in the US.
Those specific model numbers were for WalMart only and probably USA WalMart only. The 8810w is called the 8811 if you buy it elsewhere. Other than WalMart, I think Rob has the best price. He ships to many countries, but you'll have to ask him specifics:[Link: hifi-remote.com]
The 6012w has a few model numbers, all 601x. There is also a another model with 801x model numbers (URC-8011 for most mail order, URC-8017 retail in Canada, etc.) that is just like the 601x models but with two extra device buttons.
All those (601x, 801x and 881x) have the same set of built-in codes. I'm not sure what other lines have the specific setup code Jon suggested. I don't know whether a discounted, discontinued Radio Shack model is something you have any chance of finding locally. Other than a discount like that, the 601x models are the only ones you're likely to find under $20 shipped. Though there's plenty you can find well under that $250 robbery.