Thank you both! MrsCB for recommending the Superdry skinny cords in aubergine and, Dexter, for linking me to MrsCB's link. They arrived today and are just what I've been looking for. Gorgeous, beautiful colour and a great fit, perfect with my, still in their box, ankle boots!
Only thing I'm browned off about is that I had a really nice pale, silvery gray cable knit rollneck jumper which would have been perfect with them ... it wasn't there when I went searching for it so I must have put it in a charity bag - grrr.