Thanks all!! I called comp-tac yesterday to put my order in for a kydex shell to swap out with my current rig. First problem was they have came out with a "generation 2" MTAC and the shells they make now don't fit the generation 1 MTACs. So you have to order a complete rig. Bummer, because this was one of the main reasons I went with the MTAC. I said, "Oh well. I guess I'll go ahead and order the whole rig." They wanted to know for which weapon and I told them the Sig 1911 RCS. "Oh, we don't make any shells for the Sig 1911s."
I called up Crossbreed to see if they make a supertuck for Sig 1911s. They said they do, so I ordered one and it should be here in 4-5 weeks!
