One of the best sources for battery cable supplies and materials for dual
battery installations is Wrangler Power Products of Prescott, Arizona. 

They've just come out with their 1996 catalog ($3.00) which is available at
PO Box 12109, Prescott, Az, 86304-2109. Phone 520-717-1711.

If you are planning a dual battery installation, get this catalog. Other
companies have stuff, but few have such a range as Wrangler.

While I am on the subject, let me restate a long stated position to use
relays, not isolators, when installing your 2nd batteries (you loose juice
with an isolator--voltage drop). Also, I recomend you use heavy gague (e.g.,
1/0) cable to wire up the 2nd battery. This way you can start your car with
either batttery. 

Good luck ye 2nd batt planners...
___________________________________
Derek Drew
drew@interport.net (main address for e-mail)
derekdrew@aol.com (alternate/backup address, checked infrequently)