Please Recommend Cable Between Innuos Zen Mk 3 and Merason Frerot DAC

Supra USB cable, the most you can afford.

I’ve got the Triode Wire Labs USB cable connecting my Innuos to my Border Patrol DAC and I’m thrilled.  Triode Pete will make you anything you want and not break the bank.

I like your idea of the "Mirage" made by DH Labs for $260.  That's the one I went with and notice an improvement over a basic cable and a $100 audio cable by another brand.  

If you can find a used Shunyata Theta or Alpha, I noticed a big improvement over the stock cable and the wire world starlight platinum cable.  A used theta for $400 would be a steal.  I ultimately went with the alpha but it was close

i have an Innuos  Zenith 3  running through an Innuos usb Phoenix currently connected to a Ayre DAC and before that to a Yiggy. I have tried over a half dozen usb cables including the Wireworld Platinum, The Supra, an Intona Reference,  Curious Evolved, and an Audioquest Diamond, among others and nothing sounded as good as the Sablon cable I have in plac now. I own both the 2020 and the Panatela Reserva and either will do and can be found on the used market for your desired price. I’ve read that the EVO model sounds even better but any Sablon usb cable will do and sounds to these ears as if they were made to compliment the Innuos greatest strengths which i take to be its analogue warmth, musicality and expansive soundstage. Best luck in your search.