Thanks for your reply Mark.
The tuners are actually loose but not because they are not properly screwed. The shaft seems like not filling the gap enough, like they're not wide enough (diameter). I have an Ibanez BTB with the same tuners size wise, and are much more tight. I've tried them in my Peavey and the do feel more compact and keep tuned longer (they haven't got out of tune so far).
I've been playing for 20 years now so I know how to wound strings properly
Anyway as I told you, I'm changing them because I hate golden hardware as well.
I researched quite a bit and found out that Hipshot's UL HB6Y 3/8" are the right replacement.
About ordering them from Peavey...
No answer to any of my question came back from them, including if they sell these replacements.
I don't think I'll buy anything from them.
Regards