You can convert an old radio by yourself getting an Aurora radio kit, so you will cut the shipping expenses
https://www.tech-retro.com/aurora-design/home.html
http://www.taymanelectrical.com/stereo.htm
Not excessively cheap, but neither completelly expensive, and you can built your setup as wished with several accesories
I don't see anything about a DIY kit on the aurora site.
...and no prices.
But it looks interesting.
Nach-RT74
I couldn't find any kits you can do your self on the links provided. Do you have another link