Mazda3 corroding alloys - what to replace with

[Chimune]

Just bought a 56plte Mazda3 with alloys that look ok on the outside, but the previous owner tells me they have been replaced once already by Mazda under warranty and have now started leaking again (after being cleaned and sealed severl times etc). Bit of internet research reveals this is v common - along with Lexus alloys apparently.

So what do people usually replace Mazda3 alloys with when they are out of warranty and leaking air ?