They should be able to get you this one quickly: http://www.interstatebatteries.com/1/1/8807-12v-50ah-sla-deep-cycle-insert-sla0190.html 
 
It's the one GoWesty sells with their kit.

Stuart
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Stan Shapiro
Sent: Friday, January 15, 2016 11:02 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Deep cycle

    
I am down here at buses by the bridge and my deep cycle battery died under the driver seat.. Interstate Batteries does not have one that fits. Any suggestions? There is a Walmart in town

Sent from my Verizon Wireless 4G LTE smartphone