where to buy c&d batteries

[MACnonsence6]

tried google itll bring me to the company its self with over veiws of what they sell but i can figure out where to actually order from or see prices

found one has anyone used this site looking to get 3 of these. and then w.e the biggest i can fit in my spare tire well so 400ah + in the rear and prolly 6-800 farad maxwell cap bank if funds support it and cost of caps when i go to get them.

http://www.batteryclerk.com/store/p/66076-C-D-Dynasty-DCS-100L-12V-100Ah-UPS-Battery.html

plan is stinger 180a @idle. / prolly another 100ah or so upfront. 2 runs of 2.0 ofc +/- to the back that whats listed above. to support. a 6-7k amp @.5 and 3 ct sounds 125.2 am i atleast in the ballpark of where i need to be i feel like that is somewhat over kill for what im planning to run looking for thoughts and opinions on such