How to downgrade to Stock Rom [HTC One X 3.20.401.1 CID HTC_203) I have a rooted HTC One X with JB 4.1.1 (3.20.401.1), I deleted some unnecessary softwares but still using stock ROM.

Yesterday I relocked the bootloader and tried to install original stock rom by using 3.14.x.x RUU file. But it gave me "Bootloader version error".So I'm stuck. I have no Nandroid backup for my CID :( I could not find the 3.20.401.1 RUU file nor related Nandroid backup anywhere on the internet.

Does someone has any suggestions? I would like to revert to Stock rom to be able to get official Sense 5 OTA update which will be released very soon by HTC.
This guide is marked as "noob-friendly". Haven't tried it myself as I try to stay far away as I can from Sense:

http://forum.xda-developers.com/showthread.php?t=1859714

You were looking for 3.20.401.1? Here you can find the Nandroid Backups:

http://forum.xda-developers.com/showthread.php?t=1975140