Swivel ball part number

I’ve been looking to replace my swivel balls but haven’t been able to determine which part number is for which swivel ball type. Ive found FTC5366, FRC7065 and FTC5105. I’m pretty sure i need the ones that have a bearing top and bottom but online I’ve only seen ones with a ledge for a race on one side not both. I took the cv out and I could see a bearing at the top and movement when I turned it. The Railko bush wouldn’t be seen moving from the inside right?

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