There are couple other options I found. One is on a website called Supply Captain, they have a 'DUAL HYDRATION SYSTEM/PRC 119F RADIO CARRYING POUCH' that can carry an ASIP. Price is tad steep however, ...

The 5.11 Slickstick is compatible with standard molle attachment systems, yet functions like none other. The Slickstick slides through a UV-resistant ring making it easier to arrange and attach your ...