Whe can I buy these darts??

I found these old winmau 24g darts along with a haggard old board in the crawl space of my property when I moved in. They had red metal stems and generic flights. The grips had red and blue paint in too but I stripped that off. Not sure if that would have been original or not?. The stems and flights were damaged but the barrels feel really good for me and I'd like to try them new. Also how to clean and sharpen points if changing them isn't an option? Thanks!!