The idea of giving an item that is difficult to immerse in a mikvah to a non-Jew and then borrowing it back is known to me (see for example the answer from “Lechayam” to the related question Electric Appliances and Mikva) .
But Star-K only allow it for one day:
“Another suggestion would be to give the utensil in question to a non-Jew as an outright gift and borrow it back from the non-Jew. However, this procedure only helps for one day, such as for Shabbos.”
I have heard another idea – to give the utensil in question to another Jew as an outright gift and borrow it back from him.
Is there a source for this idea?