According to the web page for that cooler, the exact fans it comes with are NOT listed as available by themselves now. However, most of their specs are provided. The photos show that the outside fan is the 120 mm size with a square frame and max air flow 92 m³/hr. The middle fan is the 140mm size with a round frame and only small mounting hole "ears" and a max air flow of 110 m³/hr. Max total current for both fans is 0.19 A. Max backpressure ratings are not provided, but typically for finned heat exchangers you need a value over 2.0 mm water. Both need to have their mounting holes spaced just like a standard 120 mm fan - that is, 105 x 105 mm.
In the currently-posted models from Noctua we can find all-black units in the Chromax line. All these fans come with several colours of exchangeable mounting hole covers, including black. For the larger middle fan I suggest the model NF-A15 HS-PWM chromax.black.swap here
https://noctua.at/en/products/fan/nf-a15-hs-pwm-chromax-black-swap/specification
It has max air flow of 140 m³/hr and max backpressure of 2.1 mm water, with the correct hole spacing. Max current draw is 0.13 A.
For the smaller outer fan I suggest the model NF-F12 PWM chromax.black.swap here
https://noctua.at/en/products/fan/nf-f12-pwm-chromax-black-swap
It has max air flow of 93 m³/hr and max backpressure of 2.6 mm water, with the correct hole spacing. Max current draw is 0.05 A.
I believe those two would fit exactly into your cooler system giving you an all -black appearance for fans, comparable current use, and comparable or MAYBE slightly higher max airflow capacity at decent backpressure ratings.