Carribean Agave

Hello All!
There is an agave plant that grows around the the Carribean and 
southern florida.  The plant is dark green with slender 
agave "leaves" which come to a a very sharp point, reaching 
approximately four to six feet high and four to five feet across.  
There is generally no variegation, and the spikes grow to about 
twenty feet.  I have known it as Carribean Agave.  Can anyone refine 
this ID?
Also this plant is available should any summer gardener or collector 
want to add it to their stock. 

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AL