This Ortofon looks suitably rigid. Not tried one though. Whatever you buy, make sure it has elongated bolt slots for overhang adjustment as the arm does not provide this facility.
https://www.ebay.co.uk/itm/Ortofon-L...oAAOSwcGBaqRWE
And if you don't already have one, the Technics overhang gauge can be handy too. They are usually supplied with the turntables, but can be bought separately. It saves a whole lot of set-up messing around. Another good reason for sticking with the original arm.
https://www.ebay.co.uk/itm/TECHNICS-...4AAOSw1uRZt77P
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