Like tsg, I also own the SideArmor holster (sidearmor.com), which fits the SF C2 very nicely. At first, I was worried about the screws holding up under repeated tension on my Sam Browne, day in and day out, but after wearing it for duty for the past five months, it's held up quite well.
I also have the CompTac kydex holster (comp-tac.com), yet another quality holster that's sturdy and easy to remove from the belt (clip-on belt loop formed from the kydex). The only problem is, it won't allow the C2 to fully seat into the holster due to the metal clip on the C2. Instead, the SF G2Z is a perfect fit (as is the 6P, etc).
Here's a couple of photos of the front and back of the Comp-Tac (Left) and SideArmor holsters (Right).
Just a side note: Mike from Comp-Tac delivered my holster is about three days after placing an online order. The SideArmor holsters typically take about two to three weeks, and they do advise of this shipping time on their website.
Good luck in your choice(s).
-Jim