I have one I picked up in a trade about a year back. It wears the Surefire XC1 light. I did have a few issues with it but nothing that was not easily fixed. (I have no idea how many rounds the previous owner put through it)
At first it had extraction issues about ever 10th round or so, casing would be stuck in the chamber and it would try to load a new one. Did this with all ammo. Narrowed it down to a worn out extractor, hardly had any tension. Instead of buying the extractor adjuster tool I decided to be Macgyver and made my own adjustment jig with a bench vice, 3 allen keys, and duct tape. Slowly gave it some more bend until it fit snugly. There are some youtube videos on adjusting extractor tension. Could of just been mine, but nonetheless since you asked. I've had a few hundred rounds through it since without a single issue.
The second issue it had was not the LWCs fault, just design issues with 1911. It would not feed hornady critical duty or critical defense ammo. Ever 3rd round or so it would fail to load, the rubber tip would get stuck on the steep feed ramp. This was resolved with a light polish of the feed ramp and switching out the shitty stock mags for Wilson Combat ETM mags. I've fired hundreds of the hornady since then without issue. Those Wilson mags are the only thing I will now run in my 1911's with any self defense ammo.
For holsters, yes, it is a bitch to find them. I don't EDC the 1911 so no idea on IWB holsters. When I use it I run the RTI system for my "war belt". An awesome place to deal with is KT-Mech (http://www.kt-mech.com/) They can make the holster for you in any of their styles. Just use the 1911 R Springfield as the pistol and then shoot them an email with your order number to let them know you have the 4" barrel version. They will cut the holster down and refinish the edges so you cant 'even tell it was made with a 5" mold. They do excellent work. I have 4 of their Akela Duty holsters with RTI mounts and recommend them 110%. (they can also do that pistol with any of the popular light combos which I looked for many months and no one else does)
Here is a photo of the KT-Mech Akela Holsters for the LWC with XC1 light next to one for my XD45 with XC1