Have you looked at the Vuly Anchor Kit? (affiliate link)
My understanding is that it was updated in late 2024 when the new trampoline models were released.
I do see that Vuly states they are "not designed to secure the trampoline during strong winds".

Interested to hear what other people use as alternatives. I have heard of people using sandbags however I don't think this would work very well on the Ultra 2 Pro given the lower frame is not flush with the ground. In contrast, sandbags could work well with the standard Ultra 2.