Worn - no. But have read where people have swapped them out for something more fancy.

I think there was a site called cp performance someone posted about. I would try there.
eBay or Amazon? Bigger box stores will have plain looking ones, great lakes skipper, west marine, overtons, etc.

Not sure if you need adapters for some of those. Take the orig one off to see what is on there. Might also have spacers.