Bonding again!

I have just had to separate my 2 neutered male rabbits as they keep fighting. Tried everything but it's getting worse. Today I have separated them. I can't keep them separated as I haven't got the space. Rehoming is my very last option. I want to try and bond them again.
How long should I wait till I can try? Also how do I bond them?
Any advice would be great Thankyou

Bonding has to be done in neutral territory and keep them together without separating unless they fight. Good luck.