Weird and ancient IBM offline memory devices

[Peter Van Peborgh]

Vintage techie guys and girls,

Second attempt - hope springs eternal.

Do any of you know where I could get hold of IBM 3850 Mass storage  and IBM
2321 Data cell media? 1960s-1970s.

See:
https://en.wikipedia.org/wiki/IBM_3850

https://en.wikipedia.org/wiki/IBM_2321_Data_Cell

If you do, I would like to get hold of one of each.

Many thanks,

Peter