Follow-up: There seems to be quite a few brands of these type of adapter after all. I searched for DA to NEX adapter and quite a few of them popped up in eBay. The same search in Amazon.ca led to this: https://www.amazon.ca/gp/product/B078HJ5JS9/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Although the better priced adapters are available on eBay I chose Amazon for their much quicker turn around time. I just hope the adapter works as it should.
Paul, thanks for your introduction and welcome from my side.
I tried to find something for you but can only confirm, that there seems to be nothing available for your cameras on the official Sony support download page. Are you aware, that the A580 is at least nine years old, which is ages in the realm of DSLRs?
I'd recommend you go and acquire a more recent second-hand camera for which there's still official support available.
By way of introduction: I worked as a commercial photographer from 1980 to 1999 so I come from the world of film, mostly large and medium format, mostly studio. I am recently retired from another profession & bought the 2 580s just to have my hand on a digital camera and take them with me on trips.