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I'm not sure about Sanji's one tho. Also Big Mom wanted Germa because of the Raid Suit so I think Judge knows how to make them.

Raid Suit is a separate thing. Maybe Judge created it because he knew he's a weakling without his power awakened like his brothers and you know invisibilty would grant him the advantage on the battlefield missions for Germa. There is also a possibility Judge noticed which DF's Sanjo admired...

DJ is Sanji's genetic modification that he unlocked way after his siblings because of his mom who tried to protect him from being emotionless prick.