You can get second hand ones off ebay quite cheaply and then replace the parts which come into contact with the breast perhaps? Would still be cheaper than buying a brand new one.
HTH
OMG I was just talking to DH about them and told him the price. Said I was looking on ebay to see how much cheaper they were and he said " eeewwww your not getting a 2nd hand titty thing its like getting a used vibrator"

WTF I had to laugh at him cause it was like a completely random thing for him to say but I guess im getting a new one