Enhertu - cost and compassionate use

Hi everyone
I know enhertu has been in the press a lot recently and wondered if I could ask what others’ experience of getting it and paying for it was?
My husband actually has advanced stage 4 bowel cancer but his is also HER2 which is the same as many breast cancers I believe.
He has had five enhertu treatments so far at the royal marsden and as it isn’t available in the NHS this has been at a cost of about £8k each time. We’ve paid for it through pension and a crowdfunder but obviously we can’t keep going at that cost. IT IS WORKING THOUGH!
So my question is how much others might be paying at other trusts and whether anyone has been able to get a compassionate use case (and how?!)
Thanks everyone