Is that a kind of superglue? I don’t know if that would be strong enough, or flex enough. I ordered the part on Ali, in a couple of weeks it should be here :) The spoiler I will re-print but now in TPU, a kind of rubber, almost indestructible.

Yes, you can find it here: https://www.printables.com/model/1190104-airless-wheel-fcx24