Lignum Vitae heavy bails

Checking through my kit at the end of the season, I noticed that my set of heavy bails which are made of a wood called Lignum Vitae had a bail missing. Having not found the bail, I decided that I'd get another set and my initial search wasn't successful. I had another look tonight and eventually found that Readers were one of the companies that sold them and after some searching I found an obscure umpires website where they still seem to have a few in stock, so I've placed an order for another set. But, during my search I discovered that the Lignum Vitae which is found in the regions around the Carribean is an endangered and protected tree and is being phased out as an option for cricket bails. There's a new option available for heavy bails, but what it is made of I don't know.