Anyone know any good 2Bt11 custom transmission fabricators in AUS?

Had a 2017 lancer, bought an 2021 x1 and was interested in upgrading my automatic lancer rather than selling it. I have had the car for a while left mostly stock and know that the problem with adding hp lies with the CVT transmission not blowing up. I was wondering if anyone knows if there are any good custom parts manufacturers in Australia? Preferably specially suited to this kinda job?