Where to get EK-FB ASUS C5F-Z

EK-FB ASUS C5F-Z - Acetal
I have an ASUS Crosshair V Formula-Z motherboard and an FX 9590 (yes I know its old hardware...).
And the motherboard needs watercooling to run the FX 9590 on the stock clocks.
But the EK-FB ASUS C5F-Z is as far as I have found impossible to get now...
So if anyone has one, know someone who want to sell one or some other waterblock the fits this motherboard (and not impossible to get), could you be so kind to tell me?!
Thanks :D