I will only recommend the following Colt repair facilities:
The Colt Factory.
Usually the fastest and cheapest, they know more about it than anyone.
Quality of work is first class.
The problem is, they no longer have parts for many of the older guns.
Cylinder & Slide in Nebraska.
C&S is more a custom shop than a straight repair shop, but their work is absolutely top of the line.
Prices are high.
Pittsburgh Handgun Headquarters.
Fast and good on pricing.
PHH used to be the Colt factory's overflow for warranty repairs and offer top quality work.
As an added bonus, PHH apparently has a large supply of parts.
Pittsburgh Handgun Headquarters
1330 Center Ave.
Pittsburgh, PA 15229
(412) 766-6100
One option is to buy the needed parts from one of the parts houses, and have one of the above to install them.
Some of them may balk at this, since most parts for older guns are used, and these aren't always usable.
In your case, the ejector rod can almost certainly be straightened, without needing a new part.
Good, used barrels are sometimes available from:
Gun Parts Corporation.
http://www.e-gunparts.com
Jack First Gun Parts.
http://www.jackfirstgun.com