One of the best batteries you can buy mate. We have been using them in everything for a few years now and definitely don't treat them nicely and they just keep taking a beating without failure, grab yourself a yellow top D34 as they fit the battery bays for the jeeps pretty well. You can also get 2 to fit pretty easily in the battery bay if you are willing to make up a battery tray, just don't use the battery trays that are on the market that mount these batteries on their side, the batteries are fine on their side its just these trays squeeze them out of shape due to the way the tie down works on these trays which will reduce the batteries lifespan.
What area do you live, the cheapest you can get these atm are from an online site which also happens to have a few stores as well. You should be looking at about $295 for a D34, whatever you do don't walk into somewhere like battery world as most retail stores will sting you over $500.