The LBX Assaulter belt is a slightly bulkier version of the Crye Precision Modular Riggers Belt, a nice bit of kit but the Ronin style beats it in pretty much every way.
Here in the UK one option is the Intelligent Armour CT operator's belt (
http://www.body-armour-protection.co.uk/IA-CT-Team-Operators-Belt.html) - what the guys from Airsoft International actually use, not my cup of tea though. Alternately FRV Tailoring are a pretty new outfit that are doing Ronin Tactics style belts (Ronin is really a reseller for AWS, but that's beside the point!) here:
http://stores.ebay.co.uk/johnji1033?_trksid=p2047675.l2563
With the amount you're actually sticking on there though any old stiffened 'gun belt' will do the job, it certainly doesn't
need PALS webbing to carry that stuff as if you arrange it right your belt loops will keep everything in place.
As an aside, I rate the warrior assault systems roll up dump pouch over the maxpedition one, it's got a better stiffener in the opening and a draw cord closure that works independently. Maxpedition is basically a bag that hangs off your belt.