Cocoshell briquettes

Hello all,
I've only been properly bbqing and smoking since July 2013, on my search for the best fuels I came across several people talking about cocoshell briquettes being superior to heat beads. However, now I cannot find anywhere that sells them.
Is there a source for them? And are they actually any good?
Thanks guys.
I've only been properly bbqing and smoking since July 2013, on my search for the best fuels I came across several people talking about cocoshell briquettes being superior to heat beads. However, now I cannot find anywhere that sells them.
Is there a source for them? And are they actually any good?
Thanks guys.