I have the Kimber Ultra Raptor, .45ACP and absolutely love it. It's the same size as the Colt officers model I believe, so your holsters, etc will all work most likely. It's compact and easy to conceal, fun to shoot, and a damn fine carry pistol.
You have to shoot it in, as Kimber advises a minimum of 500 rounds before you trust it with your life, and I have experience with three of them, and that is vitally important. It comes so tight from the Kimber Custom shop, that you have to loosen it up gradually by firing it. A competent gun smith could smooth it out for you, but shooting it is fun, so that's what I did.
The Kimber finish is notoriously horrible, and for the life of me I don't understand this. Unless you buy a stainless pistol, you'll quickly be disappointed with the blued finish. I had mine treated with the "Black T" finish, by Wally Birdsong and Associates, just south of Jackson, MS. Their finish is outstanding, will NOT rust ever, and if it's good enough for our Navy SEAL teams, it's good enough for me. Paid just under $100 bucks to have the pistol and two mags treated a couple of years ago. This fine family business doesn't advertise, but you can find them by googling Wally Birdsong and associates. Real good people too.
Kimber bashers will tell you to buy a GLOCK, and there is nothing wrong with that choice either, but if you're used to a 1911, why switch now?
BTW, have you checked Midway or Brownells for your parts? I'd bet they have everything you need to keep that Officer's model humming for years to come. Good luck, and welcome to the forum. Be safe.