Looks aftermarket. Not original sy prop shaft.
You would have better luck laying your money down on a D&R Driveline shaft. I think there like $200 and some change...
Your tube on the shaft looks like 1 inch. D&R shaft uses 2 inch tube.
I attached a photo of a brand new D&R unit for you. Just to see how it looks.
Many people have experienced driveline vibration after switching to a propshaft without a double cardian joint.