How can we improve WHMCS?

I sell a lot of email accounts and customers often search for an email address within the search bar in whcms. The problem is, whmcs search bar takes the @ sign away, but leaves in all characters (also before the @ sign) in the domain search. If a customer wants to purchase [email protected], the whmcs domain results would come back as infowhmcs.com is available.

It would be nice if there was a way to specifically take the value after the @ and show results for the domain, not including charaters before the @ symbol.