Anyone know if there are USBC to to mini USB cables available that will allow me to plug a MacBook Pro directly into a 2Qute?
Yes you just need a printer cable any one will do. I too have my MacBook pro connected to a 2Qute but I am now using spdif via a usb > spdif converter but usb > usb sounds fine.
With usb go for usb-if certified so you know it meets electrical USB characteristics compliance (unlike expensive hifi usb cables), and then shorter the better.
Amazon basics B01LONQ7R6 (6 inches) or B01GGKYAIU (3ft) are a steal and will sound as good as anything else.