Yes parkesie, in early with a right answer. Good shout!
Currently searching eBay for £50 used replacements and crossing fingers… the car is from 2007 so spending lots doesn’t seem right, but it has just had a CVT flush/new discs/pads/etc so we definitely want it to drive for a few more years!
Well interestingly I picked the car up this morning after they put our driveshafts back on… and the rumble appears to have gone. Presumably the result of a remove/clean/grease/install cycle, I wonder how long they’ll last before the rumble returns!