This lady and her site site solve the problem of mending holes and deterioration of woolen items. Carpets too!
The felting needles are readily available in yarn stores in North America. Roving is also available in all colours.
Patons/Bernat supply roving type yarn (wool) in a ball that is variegated, lots of shades in one ball.
It’s a Win/Win. No need to discard a favourite woollen item.