The above is better. This is what I thought of at first.
https://www.ebay.com/itm/Sony-Discman-D-E206CK-Portable-CD-Player-W-DCC-E2455-CPA-7-Cassette-Adapter...
https://www.ebay.com/itm/Sony-Discman-D-E206CK-Portable-CD-Player-W-DCC-E2455-CPA-7-Cassette-Adapter...