Your KLM is safe.
About your DL one, how important is it to you?
Since it’s still the end of the year if I were you I would wait till they come to you.
You can try checking the jet booking engine and see what appears in the lowest category column on the left. Its still a risk though if they can find the same thing for you to replace.
Its a risk either way. Now I am putting the mindset of playing the stock market game and I just lose by shorting. Life moves on from here. Making other plans.