If thats the glass one that glues on instead of being screwed on you might be better off replacing them with Grote # 64581-5 or if you snowbird check out The Gambler in Quartzsite, AZ. He has a lot of the National parts he obtained when they closed up.
Joe & Angie
Shih Tzu's Cookie & Rocky
2001 Tradewinds 7390 2011 CRV EX-L Navi w/ RoadMaster FuseMaster