Website Ownership

Is it fair if a competitor takes your domain names?

My brother recently started a new business called Solidlink Grating.  He has been focused on getting all the products manufactured & ready for sale, whilst his competitors registered the 2 domain names he wanted www.solidlinkgrating.com.au & www.solidlink.com.au leaving him with no chance of getting his business online with his business name. They have directed those 2 websites straight to their original website...so don't click on the websites above!

I suggested changing the trading name but all the casting for the manhole (covers) & gratings have been already fabricated with the solidlink grating name built into the casts. 

After further investigation, I was told to take this to auDA the regulatory body to question the entitlement.

I hope this works, it would be devasting for a young bloke that's trying to get his business off the ground.