J-Train: Flash is right. Take it to your dealer and have him ship it back. It should cost much less.
But, quickdtoo is also right - there are other less expensive services.
And the price for shipping via UPS overnight has gone up regardless of what you ship. My wife ships her artwork to various galleries in different cities and to ship a 1.5' x 2' boxed up piece of art, with insurance, costs $150 and I'm sure it weighs less than a 45.
I would try the dealer route first. But, before I do that I would go on down to the 1911/45 forum and look up a thread by SharonAnne about 'If I had to do it again" building another 45 and see what she says about tuning or tweaking extractors.
The RIA is just another 1911A1, even the compact models and most likely take the same extractors as any other 1911A1 pattern true to the original with a internal extractor, and extractors cost pennies, literally. You could probably buy a handful of mil-spec extractors from any parts place for less than $10 and get it to work properly yourself.
In fact, that same $10 will probably get you a couple of them at the gun show. HTH and good luck. Mikey.