Sorry but this is one side of the story. I work as a paper pusher for our gun smiths... AKA im the guy who deals with all the warranty repairs from manufactures. Out of 100's of times I never had an issues with Kimber, so an isolated incident on what sounds like an OLD out of warranty model I would not be so rash as to go around (well a 2 post count isn't going around) blaming them for everything. I understand youre upset but something seems odd.
As others will sit here and nit pick on warranties and make statements such as Para and Taurus and Smith all have life time warranties.... I can also show you examples of Smith charging customers for certain repairs... and honestly Para and Taurus NEED life time warranties with their return and defect rate.
Taurus is a nightmare to deal with... I have sent back the same Judge Public Defender for a customer 6 times.... SIX TIMES.
A cracked frame on a 1911.... something had to have happened.
People always rag on Kimber... but having sold TONS of them (people come in and ask for Kimber by name and Kimber knows this), dealt with their warranty department... got invited to go shoot with their reps when the Solo released, and own a few of their 1911's and a few of their rifles... I can say I have had 100's of pleasant experiences with them.
I fail to believe you frame just cracked all on its own... along with an extractor... it sounds like an over pressure reload or head set back.
Noy having parts for your extractor tells me that you have an older one with an external extractor when Kimber tried it, and had issues.... way back when I believe they were switching them out for people, but that was more than 10 years ago.
FYI Smith DOES have a lifetime warranty but only until they deem its worth it.. if you read their fine print... every few years the take models that are warrantied off the list, because its not worth it to them to take up the tooling or spare parts. Model 66 is a prime example of a popular firearm by them, that is no longer under warranty.