Google is a great start! You can also utilize resources such as: www.whois.sc www.domainsurfer.com
... and others, to find similar/like domains that are registered, and then hopefully developed or in the process of development, IMHO.
Best of Luck.
I think Reg.Fee for Straightloans.com, but I'm unsure about it. It's a good domain, however I'm not sure about the connection between 'Straight' and 'Loans'.