I'm using SwapManager, Cobain and Vantec as a backup solution and am very
happy with them.

http://www.cobian.se/
http://www.mobilexperts.com/
http://www.vantecusa.com/product-storage.html

Now for my problem. Cobian is no longer being developed and SwapManager
is a royal pain to buy. How do we go about continuing Cobian? Is there
any other product that does what SwapManager does?