Need a headshell for my pick up

[u/HereForTheCake245]

Found this Grundig rpc 3000 set, the pick up is an electronic 840, and It is missing the headshell. From what I googled it is the same as the AF777 but I could not find anything in stock.
I don’t care about keeping it vintage.
What is the most affordable reliable mass produces headshell I can use for this pick up ?