I've had a sonicare for yonks, and usually buy the replacement mini heads recommended by my dentist.
I've just tried to buy the usual replacement pack of 4 and they are no more Has anyone else found this? and the normal size ones they do sell now are £30 for 4 
Amazon have loads of fake ones but I am reluctant to not use a proper sonicare brush
I am going to ring them later in the week on my day off (they don't have email contact details unfortunately)