Bags for a 4 x 4?

I'm looking at 4 linking a Dodge Ram 4 x 4. The owner wants to maintain the stock height to pull his gooseneck, but the truck rides like a tank so we're planning to parallel 4 link it with a sleeve bag and some Bilstein shocks. Just wondering what bags I should be looking for? Something like an F9000 style sleeve, but bigger to handle the weight. But I dont have room to run a huge semi bag either. Just not sure whats available for this application and where I can buy.
 
 

there is a compony that makes a air ride kit for 4x4's but it won't be stock height.   I think the kit comes in a 5"-10" and a 10"-15"i cant remember the companys name thobut they have kits for doge, chevy, and ford

yeah Kelderman. They make some nice stuff but he doesnt want a lift. Just a better ride. I can do all the 4 link and bracketry, I just need to find some options for a mid size sleeve bag.

just do a regular parrallel four link but run the big semi bags behind the axle so you have room foir them

As you get towards the middle of the truck, it gets tight with the exhaust and shock mounting.  I'd like to run the bags overaxle, kinda under the rail beside the tire just inside the upper link mount, since the bars will have to be on the outside of the rails.

Kelderman has air ride kits without lift also. http://www.keldermanairride.com/standard/truck/

Hmm cool. I wonder if we order that front kit if they would sell just the bags for the rear. No need for that to all be bolt on, I can fab everything up. Any kelderman vendors around or are they manufacturer direct only?