The 2025TC isn't the easiest turntable to fit a magnetic cartridge to, and you need that 4 pole motor to make it worthwhile. I've got a USA model and have a 50Hz 4 pole motor spare so I'm giving it a try.
Two cartridges spring to mind, the Shure M71/M74/M75/M81 slimline, the mounting bracket has a centre hole that can be enlarged to take the 6BA screw. The half inch screw "ears" will need cutting back to fit the slimline headshell. The other is the Pickering V15HB with a single mounting hole, again it needs enlarging. I'm going for the Pickering as it's more robust for exchanging LP and 78 styli. Both cartridges will be too far back in the Garrard headshell, so an additional 6BA threaded hole is needed.
I've just tried a very quick and dirty adaptation on a scrap 2025TC arm, the pictures show the result. You have to bend the bracket on the V15 to get the screw to fit, and then bend it back. It is possible to break the weld if you're heavy handed. When I do the USA model I'll drill the additional hole a little further forward - and more precisely
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The Pickering V15HB isn't common, but they do show up and I've just bought a couple quite cheaply.