When I first got my phone last July I dumped all of the partitions before doing the GPE conversion. I did this incase I ever had to return to stock for warranty purposes. I have since created an RUU flashable zip of those partitions. The partitions that I dumped were the exact same partitions that the GPE RUU overwrote.
If anybody is interested I can upload this tonight to dropbox or google drive. It'll take me a bit as its 1GB in size.
You do have to be s-offed to use this. I tested it a few days ago and it works perfectly. It's version 1.29.666.6.
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