Link https://www.amazon.com/dp/B09C6DQDNT?psc=1&smid=A1Z5H6ZGWCMTNX&ref_=chk_typ_imgToDp

The Black U12A is available as well now (174 of them)

https://www.amazon.com/gp/product/B098XP1Y38?pf_rd_r=A9Z74NPBZ5H4BP8F2H8N&pf_rd_p=8fe9b1d0-f378-4356-8bb8-cada7525eadd&pd_rd_r=416d470e-3069-4682-b33c-86625d3ee52b&pd_rd_w=a5yzc&pd_rd_wg=tczjw&ref_=pd_gw_unk

For the the front, you can place 4x120, so my suggestion will go with 4x NF-A12x25 PWM.

For 140s, in absence of the NF A14x25, I would go with BeQuiet SilentWing4 BL096 would be very quiet, if you need more airflow and willing to take more noise BL097 or ‎BL099.

In short, get this fan for the top rear exhaust and this fan gasket for the same exhaust fan. Otherwise you should be good with 12400 and 6750 XT. Good luck with the build and thanks for supporting us!