These are the style headlight trim rings that original and many replica Cobras use. I can't say for certain that they will fit the Classic Roadsters body. The price is good and I have heard good things about the quality from people who have purchased them:
https://www.ebay.com/itm/MGTF-MGA-Bu...IAAOSwrklVLv72
Moss has a lot of wiper blade options for vintage British cars. I am sure you will find something that will work for you on their site.