Have same problem Cod. Am 1,72 m with 80cm inside leg (downside is I don't have any waist at all - height comes only from pins so nothing fits)
I buy M & S Large or Ex Size or other makes XL and they are OK-ish.
I find the posher brands in large sizes(Fogal or Wolford for example) that have a proper toe and heel fit better in general.
Also see www.tightsfashion.co.uk and click on 'hosiery for longer legs' on home page. Never used site before but may have useful pointers.