Can I get a digital box for my old TV with no SCART?
Yes but you need a set top box or recorder that can feed the digital signal into your TV's aerial socket - one with what's called an RF modulator. To find one use the product search and select "Modulator output" as a criteria when you search for a set top box or recorder. See Connection wizard for how to set up the kit.
If your TV does have a SCART socket but is being used by something else a two-way SCART switch box will enable a set top box to be share the socket.