Nope, it's a CB Camelbak Thermobak repro. I'm looking for a Source though.
I was just wondering how does the Source Tactical 3L attaches to the ILBE, so I could see if I can just add the buckles to the Thermobak, at least I'd have the functionnality.
Just bought two radio pouches on eBay, Gen2 for 4.99 (+ ship) each

There's a few left, if anyone else is interested I'll PM you the link & seller.
Just saw a pair of the recon pack's sustainment pouches go for approx 140$ on eBay... I don't think I'll get them, lol. I'll probably go for CB 200 rnds SAW pouches if I ever need more capacity (and I don't think I will, the main pack is quite big^^).
I'll leave the assault pack for minor repairs this weekend, hopefully next week everything will be in!