Can a husband and wife use donor sperm to fertilize the wife’s egg and implant it in her?

Can a husband and wife use a donor egg from another woman, fertilize it with the husbands sperm and implant it into the wife?

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It’s not permissible, according to Ayatollah Sistani, for sperm of the non husband to be used

Regarding second part, yes but if it involves the exposing of the woman’s body in front of a non Mahrem it’s not permissible unless there is very pressing need to have a child since otherwise it causes unbearable hardship or distress, eg mental health issues