hello aruba,
as for myself i got my battery`s, 7 cell packs of GP 3300`s from offshore electrics boats web site. the site addy for the battery page is
http://www.offshoreelectrics.com/MainPage.htm
steven there at offshore is a great guy to work with and is easy to deal with. his battery pack prices are really good and he can make them for you in different configurations shown on his site. check his site out, you wont be dissapointed.
im sure greg will let us know where he gets his packs from
hope this helps you aruba
mitch