I've used the standard Technics headshell and the cheapish Ortofon one cited above on my Technics 1200mk2. The Ortofon one works much better with my AT440 than the Technics. Personally I wouldn't buy a knock-off Technics headshell since used original ones are not expensive anyway if you really wanted one. But I'd go with the Ortofon.
The Jelco is pretty good too but I believe it's a bit heavier and Jelco is out of business.
The Jelco is pretty good too but I believe it's a bit heavier and Jelco is out of business.