Damn. I didn't see that you were here in CA. I'm in the same boat, FWIW. Now that I can no longer use the peace officer exemption to buy off-roster handguns, I'd have to choose from among their CA Roster Approved handguns if one of mine were to become unrepairable. Unless you were willing to settle for a Shield 40 (original configuration), or one of their revolvers, you'd be left on the outside looking in. Sigh.
Personally, I'd take a long look at one of their revolvers, but then I'm a longtime revolver guy.
Not sure the company would want to create needless exposure to liability to make some unusual repair if they thought a catastrophic failure might occur. Sometimes those waivers aren't worth the paper upon which they're printed, if they reach a court room (and then there's the court of public opinion if someone is injured or killed with one of their products). I'd be very, very surprised if they offered to weld/repair a cracked stainless frame.
Best of luck to you. Let us know what happens.