Amazon has a right and left in their open box/used section. $110 for both is about as cheap as they comeCheck in the For Sale section as there are people parting out rigs all the time and you might find a set of used knuckles. Might as well do new ball joints if you replace the knuckles.
https://www.amazon.com/dp/B004I69JZY/?tag=wranglerorg-20
https://www.amazon.com/dp/B07RQ893VP/?tag=wranglerorg-20