These are actually made by a guy in Florida who makes all kinds of really cool Aluminum & stainless Norton stuff, He makes three or four styles of exhaust nuts both Stainless & alloy. I have a set of stainless ones waiting to be mounted that are more stock looking but so pretty I can't wait to mount them. He has some rocker spindle cover plates up now, check out item # 270687521192 I like the way he matches the oval shape of the stock ones & machines the holes and bolts to be flush, it looks very clean. I think I'm going to ask him to make me a set without the lines he put in the sets on Ebay right now.