Upgrading from 4.2.1 to 4.3.3 without SHSH (iPhone 4)

[kapono]

I realize this topic may have been covered before, but I haven't seen any with my particular situation.
I recently got an iPhone 4.
It is running 4.2.1 and I succesfully jailbroke it.
But now, I need to upgrade to 4.3.3.
I've tried TU, tried changing the hosts file, no luck, and I don't have SHSH blobs, because I just got the phone.
I realize 4.3.3 isn't signed anymore.
Am I SOL or is there ANY way to upgrade to stock FW 4.3.3, and then proceed to jailbreak?

Also, I am running a hardware unlock on the phone, so anything above 4.3.3 is not applicable to my situation.

[xboxbml]

I'd say ur stuck...no blobs-nowhere to go but up to 5.0.1...

Did u check TU to see what shsh blobs it does have? And also open Cydia and see what it has on first screen near top...

[kapono]

Yes, TU has 5.0.1 saved...not much help there.
And, Cydia shows the device is pending in the TSS queue.

It looks like I'm stuck with 4.2.1, until the hardware unlock works for 5.0 and on...

Thanks for your advice, xboxbml!