I have never seen surf boards persa for sale. They do sell boogie boards, smaller hard, coated form. I have seen they at a store, second floor at the Royal Plaza Mall. There used to be 2 beach bum stores, but they have closed.
I do not think I have ever seen anyone actually surfing in Aruba, the hotel side to calm and the back side, way to dangerous. It is all sail boarding or kite surfing.
Ken, not that I recommend it, but there are surfers on the island. Most of them surf over on the east coast except during storms. Wariruri is mislabled below, but we saw surfers there in December. In the past we have also seen them at Dos Playa.