(ET) Any new battery advice this year?

[tb <tbamc gbta net>]

Looks like it's finally time to break down and buy a new pack.  Old pack 
was purchased in 2004, for $50 a piece.   Nursed it along with used 
batteries as needed for the last few years.  :-)

Trojans here are about $120, US batteries $110.  Heard there was a place 
in Wichita (not too far away) with off brand battery at about $80 but 
don't know if it's true.

Any recent info on Lithium options?  BB600s still impossible to find?  
Etc…..

Thanks.

Thon