k70 lux rgb Aftermarket keys replacement

Hello,

I have a K70 lux keyboard, and while the keyboard itself works great, the keys are starting to crumble after few months of usage, with the cross shaped sockets (or whatever they are called) cracking and becoming unusable.

I'm not looking for free keys replacement by corsair, since I don't want to do this every 2 months, I'm asking if the fine people here know about sturdy, compatible aftermarket key cap sets. I know about the existence of corsair pbt double shot keys, but at this point I'm worried about their sturdiness (the cross socket doesn't look any thicker or more resistant), not to mention the ridicolous price which is basically half of what I've paid the keyboard.

Thanks in advance, cheers.