How can I get back to a stock ASUS .26 boot from AndroidRoot?

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http://forum.xda-developers.com – Hey guys, So I recently did the procedure to enable NVflash on my TF700, and flashed the AndroidRoot bootloader in the process (over my stock .26). Unfortunately, I forgot to make a backup of the bootloader before doing that. My question is, is there any way I can get back to a stock .26 bootloader now? A bootloader image file I can download somewhere? I want to do so to get back to stock .26 firmware and then upgrade to stock Jellybean. Thanks (HowTos)