What if I found the domain-name I am looking for is taken? Are there alternatives?

Sure, this is not the end of the world. You can think of an alternative name (e.g. exampleco.ps, ex-ample.ps, ex-ample1.ps, e-x-a-m-p-l-e.ps or bestexample.ps as an alternative to the registered domain-name “example.ps”) and try searching PNINA “whois” database again.