I would definitely go for ready made or made to measure.
I recently made up a pair myself to use with a mixer (male XLR to male RCA) and got both confused by online info re. wiring and also bought quite thick cable (Klotz microphone cable)
I ended up in a right old shit pickle - despite years of experience making up 'straight-forward' 5 pin Din and RCA combo cables. ...... never again, I vowed