I think Naim gear uses 5 pin din plugs. You could check to see if a Naim dealer has any cables in stock with RCA on one end.
I have a like-new set of inexpensive cables that are 5 pin din and RCA. They are for a tape deck (4 RCA plugs). The two RCA plugs that are for the input would work with anything I would guess. If you want to try them or if you'd like to try connecting a tape deck to your Creek, send me $10 and I'll ship them to you.