I am sure you are aware that Ron Wyatt discovered Mt. Sinai in Arabia in the early '80s ["Mt. Sinai in Saudi Arabia? See for yourself"]. He was imprisoned for months by Saudi Arabia for the discovery, but was freed because Islamic scholars and a Saudi prince supported him. There are DVDs as proof. Saudi Arabia erected fences around the altars after he showed them. I hope these new people, who I will gladly support, give proper credit.
With regard to biblical proof that Mt. Sinai is in Arabia, you only need the Apostle Paul, Galatians 4:
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"Tell me, ye that desire to be under the law, do ye not hear the law? For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman. But he [who was] of the bondwoman was born after the flesh; but he of the freewoman [was] by promise. Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar. For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children."