There is one offer on AliExpress that claims to have 1100 TDA1317 in stock for 18.05 USD and from another seller TDA1316T for just 4.20 USD, even more stock and less in bulk. It is sad to know how many working electronic devices get destroyed for chips in China, but I doubt the flow is still going. Did anyone try to order such an IC?
Other ICs seem available on other platforms via direct contact.
I am considering ordering some for my 2nd gen mods to create a replacement read-/write-board rather than modding working ones.
I am aware of the risk of fakes on demand: https://www.sparkfun.com/news/364