Good to see more british skiers on here!
What do you set your din at? I would imagine you'd be on the upper limits of a 12 din binding, sth 14 drivers(people say they have a much better toepiece, and that the normal one is weak in comparison) is less than the sth12 drivers, but the sth14drivers are still £150. £70 is a good deal, who's doing that? but I'd rather get a good binding and have it last.
Also if you're still using your markers and need brakes I can send you a set of marker brakes that if you snip away a small notch on the front should fit royal family bindings.
Another good possibility is get these(don't spend more than 60/70) and harvest the look pivot(not the 360 degree ones) off the skis, they're good bindings(better than your markers definitely) and they'll be very cheap if the price doesn't go up, only problem is you have to collect them, but you're in the same county