How to modify the value of an already-existing mod

[dull gorge]

In Yakuza 0, when I turn on the infinite money, I get 99 million. I want to increase it to 99 billion. What to do?

I can tell the trainer devs are no longer actively updating this trainer, so I was wondering if I can modify the thing on my own.

[ember stag]

Is there something that costs around that price range?