rabbit aggression, fixable without de-sexing why/why not?

My friend bought 2 rabbits and now her rabbits are older and the male is acting aggressive and territorial. I've researched and its normal for him to act this way but now because she doesn't like this behaviour and she wont De-sex them she's giving them away, which i think is a very un-hopeful future for them both.

I'd like to take them on and help them but only if it's possible to train him enough to know he cannot be aggressive and be able to live with humans.

is there a way? they are not permitted in our area in the first place and I'd hate to see them euthanized because of this

( obviously i cannot get them de-sexed here so i'd like to opt for training), better let them have a happy life in good care them be with a family that cannot contain them due to their problems or the council killing them.

what are your thoughts? Is it possible? or is this a lost cause?