A far better alternative would be to buy a Raspberry Pi, the cost is almost the same and you get a more modern HDMI connection for A/V as well as composite and audio, an Ethernet port, USB for keyboard/mouse/memory/expansion, Camera interface, more IO pins and certainly FAR more speed.
As they use Linux there is a huge range of software available too, including BASIC and C.
I appreciate it is a display you are looking for but I would question whether it is worth investing in one to match old technology when more versatile ones are available and more future proof.
Brian.