Today 39.6 K pcs A13 arrived to our warehouse. This is partial shipment of our 90 K pcs order placed in April, the balance is testing now and will be shipped this month. Allwinner produced these A13 SOC exclusively for us. As you can see from the label these left factory 27th of August 2019:
A13-OLinuXino was our first board with Allwinner SOC.
We released it 7 years ago back in 2012.
Although A13 is officially discontinued from Allwinner web site, A13-SOM and A13-OLinuXino are still very popular boards among our customers and we supply them in large quantity.
This is example how working Long Term supply can be achieved with company from China. Note that Allwinner do not say that they will stop manufacturing A13 after 10 years, they will keep producing as long as their masks are OK and there is demand.
olimex 
Sep 04, 2019 @ 20:59:29
A13 might be the only SOC solderable by hand. You can also find it for 1eur on several sites.
Sep 04, 2019 @ 21:49:05
There is 0 official stock of factory sealed packets from Allwinner and their distributors since 2 years. All chips you can find on these “sites” are A13 de-soldered from old tablets. Some of them still works, some don’t, but you figure this out after you assembly them and scrap half of assembled boards.
Sep 13, 2019 @ 16:13:35
That’s a huge market for you, now that Apple is using the A13 SOC.
Now seriously, it’s very nice having you here in Europe maintaining long term support for boards and SOCs that can be acquired in low volume. And that even for Chinese SOCs that were designed for cheap tablets with a couple of years of life!