From what I have been able to find out, Saudi Arabia's iTunes store is limited to iPhone apps and you cannot access free apps, so this may explain why you don't get the Credit Card NONE option. Follow the link again and when it asks you to input country, tab United states. If you have trouble finding it in the scroll, look at the top. It may not be in alphabetical order. Fill out the rest of the information. If it asks you for a US address, input an Apple store address in the US, from what I have seen some just make up an address at this point. I hope this works for you now. Let me know if it doesn't.
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Sent from my iPad using iPF