I bought a seat cover for my 50 Sport and it want even close to fitting. I emailed the seller and after a few back and forth's, he requested I mail him my old seat cover and the one he sent me. From the old cover, he made a new one and shipped it back to me. He refunded me the cost of my shipping expenses and didn't charge me an additional cent.
He's a great guy to deal with and will make sure you are 100% satisfied, which I was in the end.
I also used those spokes on my 50 and they worked extremely well. No issues there.
Dan