Fluidyne is another good choice for radiators. Fits like the Mishimoto but is of higher quality. The Koyo still has a higher capacity though; it's just a bit tougher to get it to fit, especially if you have dual oil coolers.
Also, if you have trouble finding 99 spec or don't want to deal with splicing RX-8 fans, the stock ones are fine and work great. A lot of us are still rocking those fans on aftermarket radiators. I'm sure someone around here has a set for cheap.

And like those guys said, get that undertray back on! It will help for a number of reasons.

 

Thank you all ! I really do appreciate the help.
I can find a lot of rx8 blades in US parts shops, but they don't ship oversea (except Atkins, but they don't have the motors)
I'll keep on searching, otherwise I'll just refurbish my own blades for the moment...
I ordered a Mishimoto radiator because it was the only one available in my country and I just can't wait to fix it !
obviously it's better to be in America than Europe for ordering FD parts...

 

I can ship wherever if you cover it.

 

Fan blade alternative from a 1991-1996 infiniti G20 ??

https://www.rx7club.com/build-thread.../#post12516340