Does anyone know if it is possible to buy elite night credits with points? I am 9 years platinum with over 700 nights. I just need 1 more year of platinum to make lifetime platinum.

I've booked 25 elite nights this year (of 50 needed) and that includes 15 credited from the Bonvoy credit card. I have a trip planned in December that will get me 6 more, credit card spend will probably get me 4 more but I still need 15. I am open to booking nights with points - I have close to 1.5 million - but the local hotels in Hawaii are sky high right now and I would burn through more points than I would like. Of course I could wait until next year to qualify for lifetime. I have more travel planned then.

I'm just looking for clever ideas. I already have the credit card. I could double up with the business card but don't want to take that route.

I am currently titanium but thanks to covid have not traveled much this year.