searching any possible pre and postfixes for a given domain

[Mads Rasmussen <mads () opencs com br>]

Is there a tool for this?

Let's say I have a site www.bank.com, I want to search for sites with 
similar names like mine, this could be clone site or just someone riding 
off my sites popularity.

How can I learn of sites with prefixes: *.bank and sites with postfixes: 
bank.*

I tried the google "site:" function but you have to insert the pre or 
postfixes yourself, google doesn't like wildcards :-)
I thought that maybe some spider could do that, someone has knowledge of 
any or how to do it with other tools?

Regards,

--
Mads Rasmussen
Open Communications Security
+55 11 3345 2525
http://www.opencs.com.br