Stoner holsters makes a iwb model 415 with a body shield.. They take a while to get 3-4 weeks but they are custom made and the boning fits the gun perfectly.. I got mine with a tuckable option and some leather dressing and shipped for $69 total.
I ordered the Theis. As soon as it gets here I will use it heavly and report back.
Yes the Sr9c will work in the Sr9 holster. I have the blackhawk serpa and it works fine for the 9c. It is quite bulky though.