A very good friend lost her mother to asbestosis. Her father was a builder all his life and was probably exposed to asbestos in his early work life. He lived into his 90s, his wife died at 75.
Individual susceptibility/physiology has a lot to do with it.
As have I, for some years. However as (I hope) you are healthy you were apparently luckier than me. Stay this way.
I am obviously not suggesting that I know what was the cause in my case, everything is possible and the link of my C to Asbestos in medical literature is still a subject of debate - ultimately it all just statistics on top of statistics.
And while I do agree that the dust from one set of pads will probably not make a huge difference, I think there is also a moral dimension to it - personally, I would not want to be a contributor, even if only in minute part.
So the world will probably not come to a halt if the OP uses the Asbestos pads, but if it was me I wouldn't use them in spite of being heavily invested in them to the tune of £4.95 .
Just to clarify, these pads turned out to be the wrong type so are not going on the car.
The thing is that my initial forum post was not if I should use them or not but what the legality of them being sold to me was, anyway all a bit of a moot point as its not cost effective to return them so they will live in the back of the garage until they become a collectable item