Default [Q] Need help flashing to stock

I apologise in advance for posting this, as I am aware there is a wealth of information available on this forum - I have looked in most places, but am that confused by the whole thing I almost regret having flashed a custom rom in the first place! I have just taken delivery of a new phone, and to sell my HTC One X i need to return it as close to stock as I possibly can.

What information do you need from me to be able to point me in the right direction? Here is my 'getvar all info'.

C:\fastboot>fastboot getvar all
(bootloader) version: 0.5a
(bootloader) version-bootloader: 1.31.0000
(bootloader) version-baseband: 1.1204.90.13
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 3.14.401.619
(bootloader) serialno: -
(bootloader) imei: -
(bootloader) product: endeavoru
(bootloader) platform: HBOOT-T30S
(bootloader) modelid: PJ4610000
(bootloader) cidnum: HTC__001
(bootloader) battery-status: good
(bootloader) battery-voltage: 3816mV
(bootloader) devpower: 55
(bootloader) partition-layout: None
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: None
(bootloader) hbootpreupdate: 2
(bootloader) gencheckpt: 0

Thank you in advance, and I apologise for not having worked it out from the FAQ's et al.

Edit - it would seem the RUU would work if i could get S-Off, going to have to look into how to do that - still appreciate any advice. Thanks