The BEST deal out there, and what I am wearing this very moment with a 5" 1911 tucked, is the IWB available at www.crossbreedholsters.com
This rig is absolutely amazing and at present can be had for only $36, deliverred! I paid $45 and tink that was a great price. Take a look at it and see. It is very comfortable, and tuckable to a good degree. I highly reccomend it.
Others out there I can suggest are.
(I have one and think it is great.)
(don't have but have seen and love, but very $$).
Stay away from generic el cheapos. While the crossbreed I mentioned is inexpensive it is certainly worth twice its price or more.