could you not make a harness out of webbing to ypur spec??
I've looked around myself for a 'cheeper' option, no luck yet
I'm going to a military vehicle show/swap meet this weekend. If I see something that would work I'll grab it for you JR. Always interesting stuff at this thing.
I've been thinking about getting a Hazard 4 Flip-pouch recently, which fits a Nalgene but as it has an adjustable side release closure I imagine it'd fit something larger too. They're a little cheaper than the Maxpedition bottle holders, and also have molle straps built in.