Welcome aboard. I have never heard of an Arabian RV. According to NADA Guides they were made for 3 years, 1975 to 1977. Anyway not enough data after that to track. It appears they were made for a very few more years.
I Googled and found a few fro sale, but nothing else. Does it have a name plate showing where it was built?
Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot