Can I still jailbreak ios 5.1.1 phone without blobs (now that window closed)

I'd like to jailbreak my IOS 5.1.1 iphone 4, but I didn't save its shsh blobs while the window was open. Is there a way to jailbreak it without upgrading to IOS 6? I'm guessing that the answer is no, because the 5.1.1 blobs aren't actually on the iphone, and Apple isn't creating new ones now, so I can't get signed upgrade firmware for the phonewithout upgrading to a release that's currently being signed. But I figured I'd check just in case.