If your budget stretches to £500+, I'd take a look at the AOR 8200 Mk3 from Javiation. I bought the Mk2 about ten years ago and it has an RS
-232 interface. You need to buy an optional cable (and, probably, a serial-USB adaptor for recent PCs).
The free software I downloaded from the Javiation site was Windows 3-ish era and was pretty dire so I wrote my own. It's not difficult to do if you have some programming skills and you download the command set, also from Javiation. Failing that, there's some newer software, which I haven't investigated yet. It looks pretty good but isn't cheap:
I'm afraid I have no idea what else is available.